Product review (5 stars): this unit comes with a very good User Manual which is a must to walk through ...
I have been using the WS-110 Weather Station for about 3 months now and I'm completely satisified that it performs exactly as advertised. First off, this unit comes with a very good User Manual which is a must to walk through the initial setup. And the good news is that the manual is printed in a font size that you can actually read without squinting and breaking out the magnifying glass. I have the Display Console unit setting on my coffee table and the sensor unit hanging on a nail in my carport about 75-100 feet away. Before taking the sensor unit outside I checked the calibration using other weather units I have available. The WS-110 was within .3 degrees of the mean average of the other units which I consider very accurate.
While doing the setup, I found that the factory default channel conflicted with the Pool/Spa sensor I have in my pool, so I just changed the dip switch to select another channel; very simple operation. I followed the User Manual recommendation to place the sensor on a North facing wall out of direct sunlight and protected from direct rain, like under an eve. I don't know what distance the wireless operation is rated at but I have found that in my configuration of about 100 feet with several interior walls between the Console and sensor it is just about at it's limit. I need to do more testing to check the distance with a clear line of sight.
In my setup I use battery power and the original batteries are still strong after 3 months. When not using the included AC adapter, I do not display the Colored Backlight full time, however with one press of the LED Button the color will display for a few seconds; very cool.  In summary, this is a nicely priced unit for the many features of the WS-110. This is the first week of really cold weather for me and I'm quite excited about taking the unit through it's course and seeing the LED colors and charting the temp changes.

Update: The wireless capability is rated for 300 feet for line of sight and 100 feet for most other configurations.