Product review (5 stars): Good Inexpensive Meter
Seems to be accurate in both temperature and humidity, but I have not calibrated it.  The hundreth's of a degree and percent humidity seem a bit of overkill on with +/- 2% humidity and +/- 1 degree F accuracy.  Like others, I would have found a back light useful, but since this meter matches performance of $100+ meter at a fraction of cost, I can accept that.