I don't have an opinion either way, yet. I have noticed something regarding the auto turner that I haven't read on this forum. As the egg turner turns to each side the elevation of the egg drops. If you have a still air incubator the temperature of the air at the top of the eggs decreases as well. I have recorded a 1.5 degree temperature change from straight up to fully tilted to either side. My hatch rate has not been that great. I have a feeling this is my biggest problem.