When did your babies adjust to daycare?

I'm putting my 9 month old into daycare finally. It's a very nice daycare and seems great but I'm sooo nervous to be leaving my baby with a bunch of strangers. The caregivers he will be with have been there for 20 and 30 years so I know he's in good hands. How long did it take your baby to adjust to being in daycare? Did they cry a lot the first few days? When did they start sleeping well there?