We stayed in the two connected apartments and they worked out really well! The apartment was in a quiet neighborhood right around the corner from a metro (Ubahn) stop, close to restaurants and grocery stores - very very convenient! Our check-in was the only hiccup - the door code to get into the front apartment was not the same as the door code to get into the back apartment and there was a lot of confusion about that. The door between the apartments is inconvenient because if you allow it to close, you can only open it from one side with the code, and if you leave it open, it sticks out awkwardly into the narrow hallway. But after that first day hiccup everything was pretty great!