I stayed here for 30 days. I highly recommend this place for any guests in Boston :)
Tobias and his family were so friendly, considerate, and always available.
The room was very clean and spacious. The house itself is clean and cozy. There is a heater in the room so you can stay as warm as you want if the weather is cold. The bed was comfortable: I frequently suffer from back pain with a bad mattress but that never happened. The bathroom is just next to the guest room, and is almost available for private use (one of the great advantages of this place). Towels are provided sufficiently. The kitchen was so well equipped and free to use.
< 10 mins to the T station (subway) by walk. There are cafes, restaurants, gyms, and markets within walking distance, I enjoyed all those places.