Product review (5 stars): Excellent temperature and humidity probe
I really liked this combination probe.  I have several thermometers and one other humidity probe, but having both together in a sturdy package is very nice.  I've been using this probe in my basement to make sure the humidity stays in a good level to reduce the chance of mold.  Most people said the humidity reading was instantaneous, but I found I had to wait a couple of minutes for it to stabilize.  I probably was in a couple of percentage points quickly, but I like to be exact.  The temperature measurement was very quick though, stabilized in a couple of seconds.

I really like that the temperature probe is able to be put down into ductwork so I can measure the AC temperature in the duct and not wait until it mixes with the room air.

The unit appears very sturdy and well made, there is a carrying case included to keep it from getting banged up.  I would recommend adding this to your test arsenal if you have a need for measuring humidity and temperature.