My friend and I had a great time in Boston! Although we didn't meet Dan and John the check-in/check-out worked out really well.
There are two rooms of which we had the (pretty) small one and we had also access to the living room and the kitchen. Our room had a single bed and a pull out sofa. However neither of us did sleep on the sofa because the head piece was too hard to sleep on. Maybe it was only because we did put it up the wrong way but there was not really another alternative. So the sleeping situation wasn't ideal as we both had to sleep in the single bed.
The location was pretty good as you have the red line to get directly to the city center and you have a supermarket nearby.
All in all we had a nice stay.