Product review (4 stars): Can't display outdoor dew point and temperature simultaneously.
For the price it is very good. However, it does have some shortcomings. If you leave it powered by the supplied AC adapter it will read 1-2 degrees higher than normal. I assume it is because it is powering the colored LED backlights and warming up the unit above ambient. Unplug it and let it run off the batteries and you'll see the temperature drop back to "normal". This isn't a big deal to me because the colored LED lights are more of a gimmick than a critical feature. I just run it off of AA batteries.

The manual says to use Alkaline or lithium batteries to power the base unit and remotes. I used rechargeable NiMH (sanyo eneloop) and it seems to work fine. They might not work in colder climates, but here in the south they seem to be working fine.

My biggest gripe is the way it displays outdoor dew point. You can configure it to display dew point or temperature. It always displays relative humidity. This is silly. The dew point AND the temperature are the needed information (particularly if you live in the south). There is no way to display outdoor temp and dew point simultaneously. You have to cycle through the setup buttons to check the dew point. This almost pushed me to give it 3 stars, but the price and display really are good, so I gave it 4.