I have to say, I am totally pleased with my styrofoam incubators. I have two and was eyeing a third today but held off buying it. It took two days of keeping an eye on the temp and humidity before I put my first batch of eggs in, but after that, it has been a breeze. Once I got the temp set it never fluctuates. I add water every 3 or 4 days to keep the humidity at about 25%. I have automatic turners. I candle twice and remove eggs thursday to the hatcher ( another styrofoam incubator) and set eggs Sunday. I typically candle on a Thursday or Sunday since its open cause I am adding or removing eggs.
I totally am still getting a sportsman ( I hate you Megan ) but will then use the styrofoam ones also as hatchers or spare incubators. Untill then, these seem to be working great. I have them in our dining room, where the temp remains pretty constant. Right now I have a good size list of people waiting for hatching eggs so I won't have as many to set myself so just the two , 1 as hatcher and 1 as incubator seem to be all I need. I do already have two more automatic turners and I hate to seem them go to waste. But I guess it means I have room to hatch more project eggs.
Lanae