Location is absolutely elite as everyone has written. Minutes walk away from supermarkets, TD Garden, Boston Commons, subway, you name it, you can't get better than this.
Communication is likewise flawless - a small problem with entry was resolved within three minutes when messaging, and Sophia provides video instructions of absolutely anything you need to know about check-in, entry, building layout, she's thought of everything.
The staircases really are tiny and steep, anything bigger than a carry on has left marks on the walls so make sure you take that into account and steep carefully. They creak a bit but that didn't worry me as much as I worried it would disturb the other room occupants. Old but cute, just like the whole apartment.
I was staying in room B but had no trouble at all with the heating or the bathroom or shower as others suggested so I believe they must have now been fixed. However yes the shower and toilet flushing may wake you up if you are a light sleeper, bring earplugs.
Room size is perfect for one person, however the mattress is extremely old and not too supportive, and perhaps a sheet update is needed.
A good stay that is far preferable to many other options. Thank you Sophia