Product review (3 stars): Accurate temp but the humidity is off
Just chiming in to back up what others have said: the temp reading is pretty accurate but the humidity reading is not.  In my case it's at least consistently wrong by about -10% so I just do the math when I look at it.  Not ideal, so if humidity matters I'd look for something else.  On the positive side it is well built, compact, and easy to read.