Two thumbs up for location! I was taking a class at Columbia which is quite farther up north in Manhattan but was able to get there in about thirty minutes as Julia's place is close to a subway stop. I enjoyed staying in DUMBO/her neighbourhood - took advantage of being near Brooklyn Bridge Park and visited a few times. Also dropped by the Brooklyn Flea which literally takes place just outside the building.
Julia was a great host, easy to talk to and get in touch with. She was flexible with check-in/out times which made for an easy stay. I was a little nervous that the room had a skylight and no windows, but was pleasantly surprised at how bright and spacious it was. No complaints about the room, very comfortable bed, calm and open space. FYI, guests have access to their room, the kitchen and bathroom. I don't believe you have access to the living room but cannot confirm as I didn't ask.
All things considered, I would recommend staying at Julia's as it was clean, comfortable, in an interesting neighbourhood and close to subway stops making it easy to get to Manhattan.