I stayed at Celia's house for a month while doing remote school for eight hours a day. While Celia is very kind and responsive and the house is generally great (beware of the many steps though), I can't recommend this place for people in my circumstance (long term, staying in the room most of the day). Celia, who also works at home, has a habit of playing her music loudly from a speaker in the kitchen for most of the day/evening which was distracting during my classes. She also routinely left the music (and sometimes the TV) playing when she left the house.
Kitchen space was pretty limited and Celia is a bit particular about how you use it. Bathroom was nice, but the water pressure is severely lacking.
I'd recommend this place for short-term stays in Boston, during which the guest is out of the house most of the day.
Prince, the dog, was a nice bonus though!