I use mine regularly, and it is a very handy item. Actually, I have two of them, but the one I bought at Harbor Freight has such a large probe that it won't fit into a spark plug hole. I use it for external inspection of hard to see areas. It has a built-in screen, however, and doesn't require the use of a laptop to get a picture.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!