Product review (5 stars): Sturdy. Easy to use. Lets you track numbers over time.
First, note that this is really intended for HVAC technicians. If you just want to check the humidity in your house, then you can get a pretty accurate reader for about ten bucks. With that in mind, we actually have moisture issues, and we've been working with an insulation expert to try to figure out what's going on, which requires detailed checks and records since the problem isn't obvious. Some of the nooks and crannies in our house smell like damp wood, frequently, and we're trying to determine if we need better ventilation, if there are roofing issues, etc.

This meter comes ready to go out of the box---it even has the battery and the promise of 85 hours of continuous use. With a press of the button you get an instant readings of temperature and humidity level (C or F, your choice). You can also take wet bulb measurements and dew point temperatures.

It comes with a case, and the plastic seems sturdy enough that it could survive some bounces on the floor or knocks against other tools. If this is your field, or if you just need advanced readings like we do, it seems like you can't go wrong with this one.