Great Product
This is a nice little weather station and does exactly what I was hoping. It is very acurate and very reliable. Took about 12 hours to sync up to the Atomic clock, but since then has been perfect. It's able to tell the weather for the next 12 hours or so, and is accurate. I like being able to see the humidity, and with the extra sensors that can be purchased and linked to the main station, you can have the temp and humidity for different places inside your house and outside in the yard. It's fun.

Nice features/Design, very poor reliability
Less than 6 months pass and the unit went bad. The sensor doesn't collect the right outside humidity and the receiver doesn't sync the time. Hopefully Oregon will support/replace the unit. After waiting 6 weeks for the replacement product, I'm told it's in back order. Don't buy this product.

Pretty good, but too many annoying bugs
Pros:
+ The temperature and humidity readings for indoors and the remote outdoor sensor seem to be accurate, and are easy to read.
+ I like the atomic clock syncing!

Cons:
- The weather forecast feature is a joke. It frequently predicts Rain, even if the humidity is below 20%! I'm guessing that the predicted weather is based purely on the barometric pressure, but at least here in Tucson, AZ, it doesn't work at all.
- It's not obvious at first glance which temperature/humidity values are for the indoor sensor, and which for outside. I wish the indicator icons for this were bigger.
- In Arizona, we don't participate in Daylight Savings Time. This device apparently doesn't know that, because the displayed time is now an hour ahead ever since the rest of the country went on savings time.
- It isn't possible to hang the unit on the wall like I was hoping to do. It bulges out in the back, so it has to sit on a flat surface.

Wish:
* I like the "trend arrow" next to the temperature and humidity values, but it would be *really* cool to have a weather station that kept an internal log of these measurements that I could download to my computer. Heck, throw a 802.11 chip in there and let me interface with it on my wireless lan.

Impossible to review when it arrives broken
The Amazon reseller in this care - ANT Technologies - shipped a broken product and has yet to reimburse me for the item. There are a lot of cracks in this Amazon marketplace .... I strongly recommend staying away from anything sold by ANT

Great value with both indoor and outdoor RH
I follow another reader's comment and use Lithium battery for the outdoor unit, it has been working fine for nearly half a year (the past few months approx. 14F(-10C) outdoor). For most residential homes (wooden construction), the radio frequency can pass through nearly all walls without degradation (if you are in an apartment with reinforced concrete floor, the steel bar will reduce the coverage quite significantly). I put it under the awning on the side of the house that is not facing the sun. The reading is consistent with my other weather stations. (due to difference in wind speed, approx. 2F difference in reading between ground and 2nd floor under winter high wind is expected).

Always put both indoor and outdoor units at the same location for the first day or two to ensure the product is working (readings are in sync.), on your first use, or battery reset.