The exterior of the building is a bit decrepit (external second floor stairs are scary), but the apartment itself is pretty nice--probably recently renovated. The pictures are accurate. The T stop is a block away, so a convenient location.
Check-in was not smooth. We told the host when we would arrive (pretty accurately given traffic). The host said he would meet us, but was not there. We tried texting, Airbnb email, and phoning but got no response. We called the Airbnb customer service line, who seemed to be able to contact the host. After about an hour the host called and apologized (and told us the trivial way to get in). Previously the host had been slow to respond to our Airbnb emails.
There are lots of closets, but most are filled with the host's stuff -- I think it is tacky to leave personal items like clothing in a closet.
The promised juice from the Airbnb description was not there.
There is only one parking spot--we had two cars. Parking in this neighborhood is challenging (mostly requiring permits). We found parking on Warren street the other side of Commonwealth, which was ok at least for the weekend without permits.