It is really easy to use. It produces very good images of some walls in my home that are surprisingly leaky in some areas but not other areas on the same wall. The difference in temperature shows up as about 9 degrees Centigrade, a lot. This is on a wall that is all painted with the same paint so emissivity variations do not come into play in this measurement. You can even see the outlines of the cinderblock behind the drywall! Using this rationally priced IR imager will easily save me the purchase price in one season!