The Advance has a digital temperature/humidity readout. You can program them and it will maintain them is a very easy way. I bought the advance and I love it so far. I just moved my first clutch to the hatching incubator (this was recommended because the chick fluff can get up into the fan if you hatch in there. It can be cleaned but I have a Farm Innovators foam-type one so I am hatching in there). I am about mid way thru the hatch and have another set of 9 eggs that are still incubating. They are about 2 weeks behind. I would recommend also ordering the foam tray liner and divider covers if you do get the Brinsea. The 20 does not come with them, but the 40 does.I want to try & hatch eggs in may...researching incubators & think I want a Brinsea 20...whats the difference between the eco with auto turning tray & the advance other than price if I get the eco & auto turner isn't it the same as getting the advance at a much lower price?
Also is it better to use an auto turner or turn them by hand? Does one have a higher hatch rate than the other?