The apartment was okay. It would definitely benefit from more attention from the host (like new pillows, couch dry-cleaning and other small things). The location is amazing, very close to Charles square. However, since it's an old building, we could hear the neighbours going up and down the stairs pretty well. Also, we've stayed with a dog and she was very comfortable in the apartment.
We've booked the place several hours before the check in and the host was very slow with responds. There is a need to fill in the forms for the foreign police (normal stuff), but the pace of communication was stressing us out a little. Otherwise, the host was nice enough to call us and make sure that we got all the info necessary for entering the apartment.
Overall, it was a pretty nice stay.