I like mine but it seems more a toy than anything. I worry that I'm going to destroy the temp tape since on the last 10 minutes of the boil, I run the boiling wort through it and my whole system. It still works now but if I could have done it again, I would have installed a T with a gauge thermometer.
Shirley a length of copper tube with a sticky back thermometer would work better with a higher coefficient of heat transfer and employing significantly less metal?
I have one if you want to buy it! West Norwood, London. Brand new, never used. I took it out of the box a couple of times but it has never had any liquid through it.