Gema was really nice and responsive.
The room is spacious (considering Boston) and has everything you need. It was also very clean.
The bathroom is very old and could have been a bit better looked after in my opinion, but it was good enough.
The area is safe and in walking distance to downtown Boston and Harvard University (each an about 45 minutes walk).
The room is very expensive for what is has to offer but I guess that is the Boston/Cambridge area in general.
Overall I would recommend staying here!