Billy's space is beautiful. I stayed with my parents and we thoroughly enjoyed it. The apartment is very spacious and everything you could possibly need is provided. It is in a lovely and quiet location but is still only a 5-7 minute walk to get right into the center of Boston. It is very close to the Orange and Red lines which will take you anywhere.
Billy went out of his way a couple of times to help us out and was so quick in responding to our requests. I would thoroughly recommend this apartment.