My neighbor goes to the one in Longwood and they have been very happy so far. I would use it myself but they don't open until 7, and I can't get to work in time. Another one to try is the day care at Kendal (The retirement community). They don't advertise- it is open first for employees kids, and then open to the public. But they have a 4-1 infant ratio, and reasonably priced. I don't have their contact info, but if you call them they will get you the day care number.
It may have changed, but when I looked at the Ducklings in Willowdale (Kennett?) they only took kids 2 and over. My little guy was 12 months so that obviously didn't work for us. I also remember that they were free-play and we were looking for something that had more of a "curriculum".
Re: Ducklings - Kennett or Longwood