Product review (4 stars): Serves its purpose....for me
Thermometers tend to be very accurate in any price range.  But hygrometers in this price range are usually far less accurate.  My purpose for keeping several hygrometers placed around my house is to moniter the effectivness of upstairs and downstairs humidifiers during the very dry heating season.  This little instrument serves that purpose and is very close to the RH readout of other humidity measuring devices placed close to it.
If you're looking for an inexpensive way of making sure you are raising the humidity level in a room, this will work. The smaller sized number temperature readout is very accurate compared to thermostat settings.