Boris and Susan's home is really lovely - it's well decorated and has everything you need as well as the fact that the bedroom was very spacious (I stayed in the Wood Island room). Cute little touches like free snacks and tea/coffee as well as a full fridge of drinks. It's approx a 10-min walk to the T and a few stops to central Boston from there. The bed was also insanely comfortable!
The downsides - the area isn't the best. East Boston, although seeming safe, I felt uncomfortable travelling back alone at night. My bedroom had ants, which wasn't a massive deal until I took some of my food out of the fridge to find ants crawling in it! The walls are also incredibly thin - you can literally hear every movement other guests make not to mention the fact that the apartment is close to the airport so planes are flying at all hours. Not great if you want a peaceful nights sleep! Finally, the downstairs shower/toilet is right in the living room/kitchen area, which was a bit odd and awkward bumping into guests in the kitchen when you're in your PJ's or just out of the shower/toilet!