I personally use the Accurite from walmart and i found they are pretty close on the temp they read(with in like 3 degrees) I need to get a coupler batteries I think I had one just run out of get go which I can't complain it ran for like 2-3 year now on the battery it came with lol.. I need to get about 2 more of them for the incubator and the QT rack I was given ( the black plastic 6 tub one. My friend got it with a bunch of snake and gace itto me since he don't like it it liek a 28- or 32 quart deal so I figure i can use it for when I get new snakes or as an ove flow rack until I can make more room in the reptile room to place it.