It's really a fun/neat tool to have along but as jmtandem stated it is more than one practically needs. It is really pricy and if I would have had to buy it, it wouldn’t have come along. I’m glad it was available. If ever I had to buy one, it would probably be one of those Harbor Freight ones that was mentioned.
I found the inexpensive Harbor Freight infrared temp probe to be within two degrees accuracy or so. I think for $39 they are all that is really needed to determine if you are going to have a brake or hub problem. I have even tested it against my body temp and it was right on. For trailering they are all that is really needed. Not saying that fancy high tech stuff is not fun to play with as it certainly can be.
