I spent 4 months at Kevin's place and it's been a really great and flawless experience !
Kevin and Kellie (who is managing the house on stage) were very kind, helpful, and responsive.
The house is charming, spacious, clean, and looks exactly as described on the pictures. Besides, it is fully equipped from the bathroom (towels, bath mat, soap, toilet roll, basic sanitary products, first-aid kit, etc.) to the kitchen (plenty of pans and saucepans, all possible kitchen tools, microwave, oven, electric stove, large fridge + freezer, and so on).
The bedroom I occupied was really large (almost as large as a studio), bright, and very well furnished (2 closets, shelves, nightstands, drawers, a bunch of hangers, television, desk), and has a nice sight on the park nearby through the bay window. In addition, the rooftop offers an amazing panoramic city sight.
The residential neighborhood is peaceful and safe, and located about 10 min walk from Roxbury Crossing (Orange tram line), 20 min walk from the grocery store (Stop & Shop), and 25 min walk from Longwood area.
In conclusion, if you're looking for a place to stay in Boston, just go for it, it's a no-brainer !