I received right after Christmas was the small yellow plastic one that is on ebay for $23.00. I laughed and told my husband I waste that much money. So what did I have to loose. It came in real quick also. In it now is my 2nd batch of quail-it only holds 5 to 7 eggs, and you can see right in there without opening. 1st batch hatched. Guys after I say this-with my luck-it will probably go down. But the little machine is right on the money.
When I was younger I use to hatch out of that yellow dome thing all the time. I had great results. I always had a 50% or a 100% hatch rate from 2 chicken eggs.