The Reptibator by Zoomed is one of the only commercial incubators that has a built in proportional thermostat. It is a great incubator for the price and is used in a lot of public zoo breeding programs. I just hatched out a clutch of 5 eggs out of 5 laid on August 3rd. The temperature was steady and reliable throughout the whole incubation period. The humidity was what had to be tweaked. But I used press and seal on the tubs to improve on the humidity percentages.![]()