from what I heard the hovabator works pretty good but you still need to use a T-stat to regulate the temp as the hovators regulator isn't that reliable.

But thats all hear say as I've never tried one. I'm thinking i'll build my own and use my herpstat to regulate it. I think I have everything already to build it laying around my house.

Cooler, aquarium submersible heater, container to put vermiculite with clutch.

Here's a thread that talks about whats in use and other options

http://www.ball-pythons.net/forums/s...ight=incubator