Best Answer - Chosen by Voters
It is a decision that you personally have to make. You are the one that sees the place, sees and are checking the references. You also might want to check and see what your state law is as to what the teacher to student ratio is. Some states have to have a certain amount of teachers. If they are not staying within state laws I'd be suspicious.
If you want a personal opinion, I would not. I wouldn't put my son in a place with any more then 4-5 kids per adult. Not at those ages especially. They might get the care they HAVE to have, but are they going to get extra attention, extra snuggles, and the type of attention you'd give them? Probably not.