My kids are 5 and 3, my oldest spent a lot of time in daycare as an infant since both my wife and I were working. Here's a couple honest suggestions if anyone is listening
Our best experience with a daycare was one with a stable solid staff. The lady that ran the place was a no nonsense hardass. A stickler for procedure and didn't take shit from anyone. This really helped us feel like someone was in charge and on top of things. The lady who took care of our infant was there the whole time we were enrolled and had been there for quite some time before. It really helps the child when there are no staff changes, the child has to get adjusted and use to the adult and feel comfortable and secure. If there's high rollover then it can really make things awful for the child and therefore the parents.
One final suggestion, it would be useful to have some sort of program that reaches out to parents and helps them emotionally as much as possible during enrollment and especially the first day. It's pretty gut wrenching to drop off your child who hasn't left your arms in months to a stranger, you can always tell the new kids because their parents are the ones crying their eyes out in the parking lot. It's hard on fathers (i cried) but especially mothers. My wife couldn't do it, I had drop off duty every day.