Product review (3 stars): so good. Pretty accurate
Haven't had it long enough to give it 5 stars.  So far, so good.  Pretty accurate.  Wanted it mostly for outdoor humidity.  Coincidentally, I just looked at outdoor info before I checked my email and it wasn't showing and I thought "ah oh", but appeared within a few seconds...don't know what that was about and hoping it's not an issue in the future.
UPDATE:
Well, it's about 16 months and the outdoor readings stopped.  I tried everything.  It worked very well, so if it's worth $35ish bucks for 16mo, go ahead and buy it.  It is the most accurate one I've had and will now buy Ambient (its twin) and see how that goes.  The outdoor humidity is very important to me.  I've thrown out at least 3 other ones.