The reptibator worked fairly well for me, except it was too small for anything over a single clutch. Like someone else mentioned close the little holes in it and make sure you get a good thermometer/hygrometer like accurite because the placment of the reptibators temp/hyg probe is up high and close to the heat source, makes it so you will have to set the thermostat higher to good heat on the eggs. I believe mine was like a 5-6 degree difference so it had to be set at 94-95 to put eggs at 89. Good luck to you!