My recommendation in one word: AVOID!
If you want to know why or you already booked this place and don't know how to get yourself out of it, read on (based on real (mine) experience).
So, you arrived there late and went to sleep (wifi is not working, but you are too tired to fix it). You can't sleep because there is a low persistent noise coming from behind the wall that is 50 cm from you bed -- this is because there is a communal boiler located there (the exhaust is going above your bed, by the way). You woke up and the apartment is dark -- so dark that with open windows on a sunny day you can't read in the parlour. You go to the shower and the floor is moving under your feet, tiles are cracked and show signs of amateur repairs. You might even catch a sighting of a cockroach by the bed. What to do? (if you caught those problems in the first 24 hours skip the first step)
1) search for 105 CMR 410(point)000 and call Boston inspectional services (isd@boston.gov) requesting an immediate inspection as the dwelling is unfit for human occupancy: it violates 410(point)250(A) (windows are 6.8% of ground floor size), 410(point)550(A) (cockroaches), and 410(point)482 (smoke and CO2 detectors don't work -- but test them first). They should come in 24 hours. DO NOT CONTACT CHRISTOPHER!
2) Document everything (Airbnb cares for pictures of cockroaches and video of detectors testing, but take other pictures too if you are within 24 hours and plan to claim "not as described")
3) Pack your bags and find another place to stay (don't book it yet).
4) Get hold of airbnb support phone number and have it ready.
5) Contact Christopher via Airbnb -- from this moment you have 1 hour to eviction.
6) Escalate conflict on Airbnb support IMMEDIATELY, don't wait for Christopher to reply -- he might claim that you are extorting money from him (as he did with me) and you might face steep fees.
7) Doesn't matter what he replies (in my case he wrote that he is sending a person to sort things out and he is sorry that I feel that way about apartment, but when the person arrived he called me and told me that I have to leave immediately) -- get ready to go.
8) Once he cancels the reservation (as he did with me) contact Airbnb support and ask for time to pack -- you are not obliged to leave immediately as he claims. Now book your reservation from 3) and go.
9) Communicate with Airbnb and get refund for your experience.
10) Enjoy the rest of your stay in Boston!