I have used the ZooMed Reptibator and had nothing but success so far. The main reason is the Reptibator is one of class by itself with a "built in" proportional thermostat. The drawback is the size and it only can hold max 2 five to seven egg ball python clutches. I used it mainly as a intro incubator but plan to upgrade to the C serpents hot box incubators down the road.All my eggs have hatched out healthy and i had no problems with spikes or loss of power or temperature issues. You set it and monitor it and you build trust in it. Zoos and veterinary institutions use the ZooMed Reptibator.