I was appreciating mine last night! I have two ten gallons on my dresser. One houses Jasper, a hatchling, and one is sitting empty, clean, furnished, waiting for a hatchling of its own. It used to be Addy's home, but she's moved on to the rack in the living room. Once I decided around Thanksgiving that everything must have a Herpstat and a probed thermometer rather than a ZooMed and a Flukers Max/Min digital that I just placed the whole thing where I wanted it (I don't think those are very accurate) I uncovered a couple UTH problems. One wasn't working at all, one was barely putting out. The UTH out at Choco/Jasmine's place, on Jasmine's viv-to-be, had to be replaced- a ZooMed. Then the Jasper-to-be UTH had to be replaced with a larger UTH- I went with ExoTerra Desert. But then Addy's UTH (ExoTerra Desert, extra small) wasn't working, either, and since I wanted to have the viv ready just in case, I ordered a matching ExoTerra Desert Small for it. And installed it, and it read about 3F colder than Jasper's side. It came in closer to Jasper's reading (Jasper's thermometer and the Herpstat match exactly) as the night went on, but ended up reading 1F cooler, so I turned Jasper up to 84F which brought empty viv up to 83F. So the whole point of this rambling story is- all I had to do is set it, digitally, one degree warmer. Can you imagine trying to dial up a ZooMed one degree?
Oh, and after all that, I'd been noticing that Choco's viv was running about ten degrees cooler than his upstairs neighbor, Jasmine. Not as cold as room temp, but too cold. I was cursing ZooMed and thinking of just going to buy a new UTH at Petsmart rather than eBay when I thought- "Doh! What if the probe came loose?" Yup, the temp probe was floating around in the aspen in the warm hide, not stuck down on the UTH. Problem solved!