I didn't know I should ask personally for the apt number so I've had terrible couple hours at night trying to get in >.< I do admit that it was my own mistake though.
The room is small but very comfortable, the view from the living room is excellent! The most important for me was that it's 3 min walking distance from Tour&Taxis and 10min from Nord Station. There's also a nice cafe in the next building. Martine was very friendly and nice to me. Overall a pleasant experience!