Seems to be a useful and handy accessory when using a torch or such. At least for beginners, I imagine.
I touched one and it was heavier than I expected. I expected something very light.
While I am sure it is very handy and probably worth the price, I still wonder if it works a lot better than one of those cheap chinese eBay thermometers with thermocouple. And what thermocouple would be suitable for such a use.