I've always had decent luck with shipped eggs in my Oct 20 Eco. Had a 90% hatch on some eggs once from Cali and I'm in Maine. Usually between 65-85%.
I let eggs sit outside of Incubator 24hrs after arrival - no turning. I then set them and immediately start turner. The turner moves extremely...
You will get chicks from the Oct Eco 20. I know some people have had trouble with the built in thermometer, but mine works great. As long as your eggs are viable and you keep your temp and humidity close(it will vary slightly), you will definitely have babies!
I am running mine now without the dividers and have 29 easily fitting. I run with water in both troughs. It is in my basement and it is winter time - dry. Humidity in bator runs between 30%-35%... I will then add material getting humidity up to around 65% for hatching. Works well.