i think that being able to controll variables like heat and humidity should be a dead giveaway. i built a decent incubator for around 35 bucks so its not exactly a wallet breaker. even if u hatch out a clutch of normals u more than pay for the materials 1st clutch. i like being able to controll the variables and get higher hatch rates. altho some people have great hatch rates with maternal incubation too. i guess id just rather not chance it