I was in Boston for a conference and this was a great place to stay.
Apartment itself was fine. Basic, but clean, comfortable and exactly what I needed.
I had to fly in early because of Dorian and Katarzyna was super accomodating & I was able to stay an extra day with no hassle.
She was also super accommodating when I had to leave my luggage past checkout on the last day because my conference was being difficult.
Flat is a great location if you're planning on going to Boston convention center. It's about a 30 minute walk which is nice if you don't have a car.
There is also roughly a 25 minute walk to a decent supermarket in the other direction.
Also if you like running, you can run down by the ocean which is super nice.
If you're in town for a conference, this is a great place to stay with really helpful hosts.