I just received the LLL Reptile's Pro MR 148 incubator which is exactly the same thing as the accu-temp 6000 last Tuesday. As soon as I plugged it in the interior light blew out. LLL Reptile offered to replace it but I would have to send it back and then they would send me a new one which would take about 2 weeks and I payed 70 bucks to have it over nighted to me because I need it in a couple of days and they refused to ship it back the same way, I refused to do that so they gave me that one at a discounted price. Its been running since last Tues and holds temps very well not even a degree off between the top and middle shelf, however between the top and bottom there is about a 5 degree difference and even between the middle shelf and bottom there is about a 3 degree difference which I am not very happy with, it is also a tad small.