We had such a nice stay in Boston. The apartment location is very central to lots of different areas... we were able to walk to some dinners/activities and others take a short uber ride. The apartment is down a short alley but you can also enter/leave on the opposite side of the building which is a busier street.
The building was kept pretty clean. The apartment itself was very clean and well kept. They provide linens and towels, but be sure to bring your own hand soap and laundry detergent. They also provided a few rolls of toilet paper and paper towels which was helpful. It was a great apartment for 2 small families, though the common space is on the smaller side. Didn't really bother us. One other thing to note: there's no bath, only 2 showers.