We liked our stay with the Carney family a lot. The hosts were really friendly and hospitable; they arranged an extra bed for us. The sleeping room is very spacious. Attached is a nice living room, kitchen and luxurious bathroom, which we had to share with two language students we hardly saw.
The house has a nice backyard with immediate access to the beachfront. The JFK library and a metro stop are nearby. The hosts connected us with their children who were performing in a restaurant in Provincetown, Cape Cod. We went to see them and had a lovely night.

I would really recommend a stay at the Carney's during your next visit to Boston.