Although it's very small, Marc has made the place into an amazing mini-apartment. The location w.r.t. places to go out is absolutely fantastic, with fun nightlife and a lot of great restaurants / coffee places / breakfast places and touristy highlights.
On the "down" side I can only come up with two things: the lack of a bathroom door makes it that you have to be really comfortable with the person who you're travelling with, and the very noisy neighbours can make sleeping a bit of a challenge.
All in all, however, I'd definitely recommend going to Marc's place: great value, great location, and also the interaction with Marc himself was absolutely perfect!