Product review (5 stars): Wonderful with (VERY) small issues
There is a lot to like about this weather station. Having had some nightmares with Ambient before I was worried, but this is a great product.

In General:

At first I did not think that I would use the changing color background. I assumed that it would become an annoying light in the bedroom, but so far it has not been a issue. In fact the night light serves to help me to stop tripping on my cats, who are intent on breaking my neck with with every step. So, in general the changing colors of the back light tend to grow on you.

The back lighting has a butt full of options, most of which I don't use. I set it to monitor the outside sensor at the highest brightness and left the programmable color range vs temperature at default. I may end up changing this in the summer as our temperature extremes may not be suited for the Arizona defaults. Time will tell.

One issue I don't like is that for best contrast between the back light and the LCD's is you need to look down slightly at the console. So with it sitting at eye level on my night stand it is considerably harder to read then when I am sitting on the bed. I don't know if this is a design issue or the limitations of LCD displays but it is annoying. The size of the LCD digits in the main display are still readable because of the wonderful size, however the same cannot be said of the smaller digits, that cannot be read without sitting up.

One thing that made me happy by its omission were the stupid forecast icons. The ones with the sunny, party sunny, cloudy and rainy symbols that where never even close to forecasting anything other then my annoyances. The fact that they were missing is what made me consider buying this unit.

The upper third:

The wonderful upper third of the display is relegated to the indoor temperature and humidity. Again the large digits are a great touch. And what I have been wishing for is a constant display of the maximum and minimum temperatures and humidity levels for just the last 24 hours or for however long you wait to reset them. A nice touch is the ability to have the display reset the data every midnight or let them accumulate over a period of time. I kinda bounce back and forth on this. But a great feature, unlike other units like this is resetting these figures are a pain in the butt. So if you want to reset accumulative min and max data just return to clear daily and at midnight everything is reset, and you can choose which data collection method you want.

There are also round smiley face icons to tell you if the humidity is wet, comfortable or dry. Now this is completely silly and a waste of display real estate. My body will tell me if I am wet, comfortable or dry. They may be accurate for one person but not another. For me any humidity level above 25% is wet and not comfortable. For where I live a humidity level of 2% is possible and has been experienced. What these icons indicate as comfortable would be oppressive here. It is judgement call that cannot be predicted on a weather station. It is just silliness.

What is missing on the upper third is a low battery indicator for the display. While the unit is best if using the included AC transformer, it should also be used with batteries in case of you're moving the display to another room or during a power failure. With dead or missing batteries I assume you would need to reset all the settings, and if you have customized the back light vs color settings this could be an unwelcoming task. So should I want to move the display I would have to meter the voltage on the batteries to ensure this can be done safely. Don't see the logic of this omission.

Unlike other weather displays you can calibrate the temperature and humidity figures to a known value. Most airports have an Automated Weather Observation System (AWOS or ATIS if an old airport) with telephone, internet access or radio access to gather these figures. If the airport is not far away you can telephone the personnel in the tower and annoy them for the information. If it is far away the readings can be off considerably. Airport weather seldom matches town weather.

While the manual states the humidity range is limited to 10% to 99%, I have seen 3%, but that could be because I calibrated the humidity sensor to a known value.

The middle third of the display:

This is much like the top third, other then you are monitoring the outside sensor. The exception being that you can switch between outside temperature and dew point. For where I live dew point is rarely a factor so I never monitor it. Your millage may very. Again I like the large temperature (or dew point) and humidity digits. They are the perfect size. The min and max digits are a bit smaller, therefore harder to read depending on the contrast and the condition of your eyes. But, again I am ok with them.

As opposed to the upper third or inside readings display there is a low battery indicator for the battery condition of the outside sensor. And speaking of the outside sensor, previous sensors have had a plastic holder that is attached to where ever you put the sensor. With this unit you hang it on a nail. I am not sure the sensor will still be there after one of our very heavy wind events. I would have preferred a better holder. The manual tells of a Temperature and Humidity Solar Radiation Shield, but upon checking the Ambient web site (quickly) I could not find it to see if it would satisfy my wind concerns and just never looked for it to see if it would protect the outdoor sensor from becoming a UFO.

When I first powered up the unit, which according to the manual will monitor up to 8 sensors, I could not find the sensor transmission icon. I checked the manual and could not find its location on the diagram. While it is there, its purpose was not labeled so I took a flashlight to shine on the LCD panel looking for any unlit icons and only then did I find it when it indicated a signal from the sensor.

Again the 2nd third (outside temperature, dew point and humidity) of the display had the silly humidity comfort icons taking up space. If I knew what I was doing I would cut the traces on the circuit board that lights these up just to stop annoying me.

And if you do live in a cold climate, do as the manual says and use lithium batteries in the outside sensor and not alkaline or rechargeable batteries. Duh.

One wonderful feature is being able to manually start the sensor search function. Handy if you loose your signal (unlikely) or after a search for your wind blown outdoor sensor being found blocks away. This manner of syncing the sensor to the display is so much better then having to power down the display and losing your customization settings.

And again, while the manual states the humidity range is limited to 10% to 99%, I have seen 3%, but that could be because I calibrated the humidity sensor to a known value.

The bottom left third of the display:

The first item on this part of the display is the moon phase. I don't like it. It is seldom accurate and for me unnecessary. Your millage may vary. In the manual is says "On a sunny day, from 7:01 am to 6:59 pm, the daytime icon is displayed (sun). From 7:00 pm to 7:00 am, the nighttime icon is displayed (moon and stars)." I have found this to not be true. It will display the moon phase 24 hours a day. But since this whole part of the display is useless it really does not matter. I am not sure why the stars are there?

In the place of the moon phase and printed on constant graph symbol that again just takes up display space I would have displayed the barometric pressure. Then under that the full date and day of the week. And under that hours, minutes and seconds. But that is just me.

Under the ill-considered moon phase part of the display you get the barometric pressure reading. This is the most accurate of various sensors.

You can set the units to be measured (mmgg, inHg or hPa). Personally I use inHg because that is what the airport, most US weather stations and radio and television stations use and I am used to it. I display relative pressure, while you have the option to display absolute pressure, I have never understood the reason why you would do that and I am by nature too lazy to research a reason.

Under the barometric pressure display is the combined date, day time display. Which hits my annoyance button. I want the full date and day and hours, minutes and seconds. But that option is not available. While there are some display selection options the best I found for me was hours, minutes and the day of the week. I ain't happy but it will do.

What is missing here is the atomic clock synchronization. While I read the full description of the product on Amazon's site. There was no indication that the automatic synchronization feature was their, but there was no mention it was no longer an option as we have gotten used to. But it is not a big deal, I can change the clock twice a year, and really I don't need to ever know the exact time. But I looked forward to seeing the display clock sync symbol so I can live with it.

Right side of the lower third:

Herein lies the wonderful graph. While I graph the barometric pressure only, you can also graph the inside temperature and humidity as well as the outside temperature and humidity. I check the temperature and humidity graphs once in a while when I have more time on my hands then I need, but generally I stick to the barometric pressure. When graphing humidity or temperature, there are some symbols that show up under the fake graph painted on symbol to the right of the useless moon phase display. It kinda gives you a hint of what graph you're looking at. But as you toggle between barometric pressure, inside temperature or humidity and outside temperature and humidity you get a short notice in the time or date area what you are looking at. So still more things on the display to make it busy.

The graph has been greatly improved. You can set the graph to display the last 12 or 24 hour graph. I stick to 24 because it makes the most sense with barometric pressure. But the truly amazing thing is the graph auto scales the vertical or y axis. So far I have seen the vertical graph range from -0.04 to +0.04 to -20.00 to +20.00. I don't know if this is the limit, there is no mention that I could find in the manual of the scale range. But this can also confuse you if you don't notice what scale it is on. You can look at the graph one minute and it seems pretty stable and the next minute you might think it is having convulsions because each segment of the graph ranges from all the way to the top and the next one all the way to the bottom and the rest anywhere in between. What has happened here is the vertical scale has changed to show a greater change in the readings. Hint, if confused, look at the vertical scale numbers. The weather has not gone amok, the scale changed.

My only wishful change to the graph is splitting the 8 symbols into 16 or even 32. Might be beyond the LCD capacity but I think it is more a programming issue.

Overall:

While I would make changes and edit the manual a bit I am pretty happy with this unit. There are other functions like alarms for most of every bit of data displayed, I don't use the alarms, so I can not speak to their usefulness. I like this unit, and would fight to the death or serious injury should anyone try to take it from me.

03/13/2015 - An Update: Since using this weather station I have to say that I have really gotten used to the changing background colors, something that I thought would annoy me, is really kinda cool. One issue that I kinda bashed it about without knowing what I was talking about, this unit has a very simple method to reset the max and min temperatures and humidity. I think at most 4 keystrokes, but I think only three. But I still hate the way the date, day, time and moon phase works. We have had some pretty strong winds, Our low and high pressures like to play air hockey where I live, and the remote sensor has stayed put.