Overall - Anne's apartment is really clean, and her husband is wonderful to talk to. The room is nice, and the hosts are willing to accommodate any reasonable request you have. Would recommend you to stay in their place.
Detailed Review -
Context - I stayed there with the intent to work from home, so my review is colored based on that.
Location - Anne's house was easy to get to via cab from the airport, about 15-20 minutes away. If you'd like to use the public transit and don't have a car, there is a bus that takes you to the red T station at Andrew, it runs regularly, and takes about 12 minutes. It takes about 30-40 minutes to get to Downtown Boston.
Accessibility - The room I stayed in was on the 1st floor, and there are no elevators, so if you're differently abled, you may want to consider that.
Lighting and View - The room receives an amazing amount of light throughout the day. The view of the autumn leaves turning red was a pretty sight to watch, as my room was road facing.
Sound insulation - As is the case with most of Boston, the police, ambulance and firetrucks keep blaring their sirens throughout the day (exacerbated by the fact you're room is road facing) , which is irritating at first, but you get used to it.
Hosts - Anne is very pragmatic and helpful, and goes out of her way to make sure you have everything you need. Her husband Weihai is wonderful to talk to and is very friendly. They provided me with all that I asked for, whether that was for extra blankets to deal with the cold, or for a fan to deal with the stuffiness. They were also willing to extend my stay as needed to help me deal with some last minute plan changes. Wonderful experience interacting with them. The property manager Ely was also very helpful.
Bed - The bed was of good quality, and I slept very well most nights.
Washer/Dryer - There is a coin laundry commonly operated for the building. You can purchase quarters from the hosts, and there usually isn't a queue for the same. I had a smooth experience with laundry.
Building construction, Heat/AC - The room I was staying in had 5 windows, and as tends to happen with some of the older constructions, it isn't perfectly insulated and can get pretty cold. However, Anne and Weihai were very helpful in providing additional blankets for the night, and I used to wear an extra jacket and thick socks through the day.
Table/ Chair - For people planning to work from home, the table was big enough for my work, and the chair was comfortable.
WiFi/ Internet - The wifi speeds were decent, and got me through my work-day (3-5Mbps download and 1Mbps upload). Most of the time my work went uninterrupted, however video calls may suffer in quality, or start lagging, especially in the evening, when everyone is using the Wifi.
Common Areas/Bathrooms - There are about 4-6 tenants living in this apartment sharing 2 bathrooms, but everyone is committed to keeping the common places clean, which is always nice to see. The fridge always has enough space for your goods, and you have dedicated storage both in the room and in the pantry to store food. I had no problems with the other longer-term guests there.
Safety - I've had multiple people advise me not to move around after 10pm at night, and would advise you to do the same if you decide to stay here. However, I had no issues personally over a 1 month stay, since I mostly stayed home around that time.