Product review (5 stars): It wasn't easy and I was afraid it would break
During the day I keep it by the TV and so can compare it's readings with those on the weather reports.  It agrees well with them.  Since it is completely battery powered, I can keep it by the bed at night to see the temperature before even getting out of bed.

I did have some difficulty installing batteries in the base unit.  The only guide was an arrow indicating which way to rotate the bottom to remove it.  It wasn't easy and I was afraid it would break.  I finally got it off and everything was smooth after that.  I didn't want to try it again to see if I could find an easier way of removing it.