Wonderful apartment, staff, and location. Highly recommend.
I moved here from the US and stayed here for a few days before moving into my long term studio lease. My flight landed close to when their check out time ends (after 6pm). I was initially a little worried about check in because in the description it sounds like a like arrival is a bit difficult and I was also lugging heavy bags for the permanent move. But it was quite the opposite. Once I rang the front desk, almost immediately two guys warmly welcomed me and helped schlep everything to my apartment.
The apartment itself is centrally located in Kreuzberg, extremely clean, and modern. I had to work remotely the first day there while recovering from jetlag and it felt like a quiet escape.