I booked with Jay after my original Air BnB host cancelled on me due to repairs on their home. I did downsize, but I also paid less so the refund made it worth it.
This place is very basic. A bed and a desk. The common areas (Kitchen and Bathroom) were quite dirty and shared by three people who are renting and living there long term.
If you're not going to be there except to sleep the. This is the place for you. Definitely look up public transportation (The T) and utilize it as that can definitely save you plenty of money as you go out day to day. I Uber-ed everywhere and certainly paid the price traveling to and from East Boston every day to do touristy things.
All said and done I booked last minute, the price was low, and the room where I slept was as described.