Michelle is a wonderful host. She was very accommodating throughout my stay in Boston. I want to give specific feedback for the different aspects of my stay below. All of these points apply to my stay, so YMMV.

Bedroom:
The room is very comfortable, with a nice bed, new linens, and a down comforter. Two windows looking east out the second story of the house. Two lamps provide adequate light at night, and there's a ceiling fan. This is a nice room for a longer stay (mine was 3 weeks).

Bathroom:
Shared between you, Michelle, and (potentially) another guest. Nice facilities, room for your stuff, etc. Michelle cleans the bathroom at least weekly and it was always spotless and very inviting. The shower is hot and the water pressure is good.

Living room:
Shared space, inviting with a leather chair and nice sofa. No TV but a very inviting place.

Kitchen:
Well-equipped, functional kitchen that you can actually use for cooking. No microwave and no dishwasher, FWIW. Michelle made space for me in her pantry and fridge. Plenty of pots, pans, utensils, etc. Gas range and gas oven. Basically everything you could ask for. You have to do your dishes, but Michelle keeps all of the shared spaces very clean and inviting.

Breakfast:
Part of the deal is that Michelle will provide breakfast for your stay. For me, since I was leaving before 7am for work, this meant that she provided coffee (whole bean, with a grinder, pour-over not drip, delicious) and homemade cereal bars. The food was always delicious and I really appreciated that she worked with my schedule to make sure I had things to eat in the morning. This was definitely above-and-beyond what I expected.

Location:
25 minute walk to Children's Hospital. 10 minute walk to Roxbury Crossing. 5 minute walk to Dudley Station. Plenty of transit connections, but all require some walking.

Host:
Do not underestimate the importance of a good host if you are looking to rent a room instead of an entire apartment. Michelle was thoughtful, helpful, and knowledgeable about the area. She was very generous throughout my stay, made a stop at Trader Joe's once for me, gave me a ride to the airport on my last day, let me borrow her laundry detergent, etc etc etc. She comes highly recommended from the other reviews, and I have to agree.

Safety:
Roxbury gets a bad rap, and that's really not appropriate. As a single 26yo male, I never felt unsafe in the neighborhood, even walking around late at night by myself. You're in a city, so be aware of your surroundings and you should be fine. I was for three weeks.

Overall:
5* for the room and hospitality. As long as the location is ok with you, there's no reason not to stay here. I had a wonderful time. Thanks Michelle!