Staying with Bradley and his family for two weeks worked out quite well. As defined in the description, the unit does have a back wall that doesn't go all the way up to the ceiling, but this didn't really end up being an issue for me. In addition, in order to get into the bathroom, guests need to enter into the family's space briefly, which while less ideal, is the only really feasible way to do it given the space that they have. Bradley and his family were really nice people, and they gave me some local pointers about local grocery stores and subways. Given I was staying for so long, I did a decent amount of cooking and it's definately doable in the kitchen space provided - a single burner hot plate and a toaster oven are provided.
Speaking of subways, if you're going into midtown, the best route from Bradley's place I found (at least while I was there) was to get on the G train at clinton + washington, transfer to the L at metropolitan ave, and then to get off at union square and from there either walk or take whatever train required to get to your final destination. I also tried the Q, and while the walk is a bit longer, it also worked (and once the L closes, the Q is probably the best route).
All in all, I enjoyed my stay and would come back again.