I spent three nights in this unit in August. It is located in the heart of town and is an easy mile walk (maybe less) to Fenway. It is very small, but clean, and the decor is cute. Onsite parking is very convenient once I figured it out.
Having stayed in almost 40 Airbnbs, I absolutely appreciate good check in and parking instructions, but I might suggest the host streamline these communications. I was sent a LOT of photos by private text of the loxbox, the gate, the parking space, the approved dumpsters, etc but I would have preferred one single pdf with photos and instructions, as the texting got a little tedious. I was also required to send a photo of my car in the parking space after we arrived, presumably to confirm I'd found the correct spot. That seemed like overkill but maybe I was just done with all the texting by this point. Also the link to fill out the parking permit didn't work, and when we got that sorted out, I had to re-send it twice via email. I do believe the host had good intentions with all this back and forth, but the whole process just felt a little clunky.
The unit is very small and its only entrance is off the back alley. There is a nice little fenced courtyard outside but it is dominated by a large trampoline and it is off limits for use. Bear in mind you are in the city, and city living brings rats, and rats are definitely out there in that alley. There is a small kitchen available, but bring your own coffee, salt, pepper, etc as there are zero condiments provided. There is a dishwasher and one dishwashing pod provided so I had to do some hand washing during my three day stay. The wash machine is convenient, but it is a combo washer/dryer unit. Its spin cycle is super loud so don't run it before bed, and if you need your clothes dried, understand it will be a 2 to 4 hour process. Plus the door locks until the dryer is sufficiently cool, so you can't get your clothes out until it decides to release the lock. I have used these types of units before and knew about these issues, but a brief note with pertinent instructions might help the uninformed. To be fair, the host did provide the machine's manual in a binder, so you can glean these details yourself if you're willing to sit down with a 30 page document.
All in all, I would say this was not my worst airbnb stay, but not one of my top ten either. It was pretty pricey and the lack of kitchen amenities like a starter cup of coffee and a couple of dishwasher pods just felt a little miserly. That said, the host was polite in her many communications, the unit was clean, and the photos were accurate.