I bought a used little giant forced air with turner for 25 dollars. Just started to use it the heat is pretty consistant humidy is a little trickier. If mine dont hatch I dont think its the incubator my eggs had a rough trip getting here. Planning on getting more eggs from a guy near by this weekend and my first is set to hatch this weekend. I think only one is doing anything. But as far as working and temps, no problem. No spikes or drops aside from a degree either way.