Location: about 10 a minute walk from the Airport subway stop, and 10 minutes from a grocery store. Neighborhood felt urban but safe (as long as you follow typical common sense safety rules around urban areas). This unit was on the first floor, but didn't have issues with street noise at all. Unit comes with its own dedicated parking in the back! Seems like a rare feature in this neighborhood.
The unit: Guests with mobility issues or small children beware! -- the kitchen floorboards are uneven and popping out, so might be a safety concern for you! It's an older Boston house, so some of the fixtures around the house are aging; overall the furnishings are both more 'minimalist' (read: barren) and more worn than the photos make them out to be, though I will say the unit as a whole also felt more spacious than it appears in photos. The unit's on the first floor, so not too much natural light, and you're next to the shared laundry room. Fortunately you can't really hear the laundry from the bedroom. Oh, and special mentions to the bed, which was surprisingly comfortable.
The host: Ella was communicative and responsive. I had a minor question about the wireless and I was impressed with how quickly she responded and gotten it settled. When we happened to bump into her the next day, she proactively asked and made sure everything was okay. She left out wine and macarons for guests, definitely a cute touch.
Overall: Ella's apartment's one of the more affordable options in the area, so you shouldn't be expecting a high-end luxury experience. However, it's in a good location and is a great value overall. I would recommend to any budget-conscious traveler.