This incubator hatched 4 out of 7 duck eggs I incubated, then 4 out of 5 quail eggs. The humidity is a bit hard to control, but the heat control works really good with no heat drops or spikes. The only bad thing about it is that its really hard to clean. after hatch, the incubator will smell bad as imagined, and its really hard to clean around the electronics to get that smell out. other than that, it's great!