I bought 2 Brinsea Eco 20's. Awesome incubator and I have hatched chicken (of course!), domestic duck & goose, call ducks, migratory ducks, pheasants, peafowl and quail all with fantastic hatch rates. The Rcom are cool though.

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Thank you for the update to this! I secretly wish for one of these, in the meantime, I chug along with my little Brinsea Mini Advance. I think it is a good think I can only hatch 7 at a time, as I was a horrid math student, and would quickly fall victim to chicken multiplication!This thread convinced me to buy an R-Com 20 and I just wanted to add that we are completely satisfied with it. Set 20 eggs in the standard chicken egg tray on 4/12. Today is day 21 and so far we have 16 chicks (out of 18 eggs, 2 were infertile or stopped developing and were removed). Last 2 haven't pipped yet but they still have time. Only negative is that some eggs were too large in the tray and would not turn automatically. We ended up turning them manually 3x a day. Next time we will try the universal tray and limit to maybe 14 eggs. Before lockdown we removed all of the eggs into a box (lined with egg trays and a heating pad) and placed a piece of vinyl cabinet shelf liner over top of the 20 egg tray (nubby side up) (was a suggestion from another BYC thread) Glad we did! Hatchlings are more comfortable and have footing and cleanup will be much easier.
The only other negative is the size of the incubator for hatching chicks. We ultimately had to break down and open it up to take the first 10 out to make room since the hatchlings were laying all over the other hatching eggs. Opening it doesn't seem like much issue because the automatic humidity and heat came back up quickly once it was closed.
Overall we are very happy with our R-Com 20 and would highly recommend it!