Mr. Misty is an okay buy.
I bought the Mr. Misty mainly for its thermometer capabilities, as I suspected that my landlord was cheating my apartment building on heat.  That part of it seems to work well.  However, I'm not as convinced by the humidity function.  I started using that function because I have horrible allergies and my doctor suggested raising the humidity level indoors to help alieviate my symptoms.  I use the Mr. Misty in conjunction with the Air-O-Swiss Ultrasonic humidifier and the read-out on the humidifier is consistently lower than the Mr. Misty.  Sometimes the two read-outs are the same, but after the humidity reaches about 45%, the Mr. Misty seems to sky-rocket up and stay far above the other read-out.  So my suggestion would be to use the Mr. Misty for temperature and not for humidity (unless you plan on keeping your humidity level below 45%).
Rating: 4 stars