Short walking distance to downtown Boston, the Freedom Trail, and the North End.
Richard was helpful when needed to drop off luggage early while I dropped off a rental car. He also recommended a good place for breakfast in the North End (Theo's Crazy Corner, also good for Brazilian cuisine).
One drawback: the stairs to get to the apartment. May be a challenge if you're not used to climbing three flights a day, or you just can't carry your stuff up there. If you can overcome this, then no problem.
Recommended for anybody coming to Boston. If I return, I'll consider this place first.