The apartment is spacious, clean and well decorated, just as described! I had a very comfortable stay and had everything I needed. Check in was perfectly smooth and communication was very quick and clear.
While the location is convenient to the subway and close to the heart of Bushwick, the street is on the outskirts of Bushwick, surrounded by a lot of garages, warehouses etc. Streetlights are not very abundant on Grattan st, so be aware of this if you plan to walk after dark. I found the walk to the Jefferson station to be better lit than the walk to Morgan station.
Also, there is an event venue directly behind the apartment and there was quite a bit of noise from an event there until about midnight one night. So, be aware of that as well if you prefer quiet in the evenings, and you might want to bring along some earplugs just in case.