While this Airbnb might not be for everyone, we found it a fine place to sleep for a few nights while exploring Cambridge and surrounding areas. I've seen some reviews take issue with the cleanliness of the kitchen, state of the house, etc. For the price, we found everything acceptable.
The house is old and is currently being slowly repaired from the look of it. The back yard is a mess and being used for storage of equipment, etc., but that wasn't part of the listing, so I don't feel it truly mattered. The kitchen could be slightly cleaner, but it wasn't a huge concern for us. There was a thin layer of dust over the tv/stand in the adjacent living room - not something that would bother me, but could see potentially bothering others.
The two rooms upstairs for guests are both recently redone, tidy, have AC, and are quiet at night. We didn't need to use AC or heat during our stay, so I can't speak to those. The bed was a bit too soft for our tastes, but was otherwise fine. Bedrooms were quiet, which is always my main concern.
Check-in was fine, although I initially had some concern over whether we were at the right location as the entry keypad was behind the screen door and I didn't immediately see it. Booker came out and gave us an overview. We were gone for most of our time at the Airbnb, so we only spoke to Booker and his daughter briefly during our stay.
In short, if you are not one of those terribly fussy people who travel about looking for problems, this is a perfectly fine place to stay to explore the Boston area.