My last 2 hatches have been in the cartons. Its hard for me to tell if they are doing better in cartons; I havent been doing it that long. But they are more stable and dont get bowled over. I think there needs to be a happy medium somewhere, since I would think when a hen hatches eggs, the eggs dont get rolled around like they do in an incubator. They are certainly easier to clean after a hatch in a carton. Ill probably continue to hatch in cartons; I will be very careful to have the aircell side up.