My 3.5 month old daughter just started at Bright Horizons last week. She adjusted immediately, thanks to the incredibly helpful teachers in her Honeybee classroom. Not only are they wonderful about making sure the babies are happy and learning (tummy time, encouraging babies to crawl, etc.), they are very in tune with each child's individual needs. For example, my breastfed daughter had been resisting taking a bottle for the past month, and the teachers there have patiently worked with her and me to get her back into it. It is still a work in progress but she is now at least taking some of her meals from a bottle!
Bright Horizons has an open-door policy, so I can drop in to see her during the workday. Every time I visit, the babies are being well-attended; some are being rocked to sleep, some are being fed their snacks or bottles, and others are playing with the variety of toys and books. There is a separate infant playground, which is outdoors and private, and the babies go on buggy rides through the park twice a day.
I highly recommend this facility and will update my review once my daughter has been going here longer!