Temp guns are a great tool, don't get me wrong. I have one and use it all the time, but people need to realize that they aren't any more accurate than most decent digital thermometers. Most are at least +/- 4 F, that is about the same as an acu-rite. The really cheap temp guns can be even worse.
I would recommend temp guns mainly to people who use rack systems, that is really what they are best for. $ for $ temp guns just don't make a huge amount of sense unless you have a very large collection. Why pay $125 for a temperature measuring device that isn't any more accurate than a $12 unit? Why pay $40 or $50 for one that is worse than the $12 unit?