Product review (5 stars): Perfect for checking the humidity level.
Excellent little hydrometer and thermometer. I used it to check on a 2 year olds room in winter time. We tend to get very dry air in the winter when our heater is on. Used the Vic's to make sure I was not over-hydrating the air (which I was before). Also, left it in the basement for a few weeks to determine the humidity level before purchasing an expensive dehumidifier.

I have seen reviews questioning the accuracy, I am not using this for scientific experiments; however it is spot on with our Nest thermostat.

I would recommend to anyone.