I have one, the Venom one actually. My buddy at work, who helped me fine tune my engine, has one, temp gun that is, and the temperatures were only a few degrees off from each other. I don't think its needed if you have the temp gun already...

BTW, how's wildwood these days. I'm from Pennsylvania orginally and we used to go down there every summer. Do they still have that Galaga machine and Mr Doo at Uries still ? Did Zabers burn down any more times?