This is a very comfortable apartment about 10 minutes walk from the Porter Square MBTA station, which is also where the supermarket, pharmacy, and other stores are. My wife and I stayed here for 13 days in October, and really enjoyed it.
The apartment has plenty of space (it would easily fit 4), and is well equipped. The only thing it lacks is a dishwasher. There is a commuter train that goes by hourly (not very late), but the noise is not serious, and after a day we didn't even notice it. Street parking was never a problem.
JG and Ann (the hosts) are very helpful, and respond quickly to messages. The dryer died while we were there, and they quickly made another one available to us.
We would definitely stay here again.