Ok, I've tried a whole bunch of hatching machines and think I have found my favorite..of course, there are more brand names on the market..so may have to keep testing others as well.
LG Still air - garbage in my opinion - we added a fan and it worked much better, but I still dumped it. Spend the extra money on a fan..trust me or you'll cook your babies. These units are not reliable without a fan and give huge temp fluctuations...the adjustment knob is very touchy. Cheap is not better.
GQF circulated air Hovabator with auto-turner (wafer thermostat) - loved it..so much I bought another. These were previously my best hatchers..till I needed more space.
GQF circulated Hovabator with auto-turner (electronic thermostat) - like it..still figuring it out I think. I think it is too hot or too cold..temp never seems just right. Still get decent hatches, but I've had better and am a little frustrated by these units.
GQF Sportsman (with autoturner and hatching tray) - LOVE IT..so much I sold my 2 older GQF styro bators. It works great and we get our best gamebird hatches out of this bator. Hold temp and humidity steady..easy to use, minimal fuss. This really is a "set it and forget it" bator.
Homemade hatcher (with forced fan air and wafer thermostat + backup wafer) - Love it..holds steady temp and humidity and basically all of my hatches are taking place in this unit now.
Jody