This place is in a great location- everything is walkable. We even walked from Fenway to the apartment, which is 2 or 2.5 miles, and never felt unsafe. CVS is across the street and there are a ton of shops and restaurants nearby, plus Boston Common just a few minutes away.
A couple of notes- they do not provide coffee so you'll need to bring your own or run to CVS. There is also no bottled water, if that matters to you. The bedroom has blinds but it's not very dark in the morning and I don't know how we could have slept if we hadn't brought our own noise machine, but that's expected downtown. There is no dresser and just one small shelf in the closet so beware of that if you're looking for an extended stay.
Communication was good, they reply to messages quickly and allowed us to check in just a few minutes early when we arrived before 5pm. The building and apartments are secure, we never questioned our safety inside or outside. The bed is also really comfortable. We would stay here again for the location alone!