Fantastic location. Very spacious beds with separate duvets. The shower was excellent, plenty of hot water and good pressure! Check-in was easy and the flat is spacious and has everything you need (no need to cook because the restaurants in Berlin are amazing). The only suggestion I have is better curtains, they do not cover the windows properly and are thin so it gets very, very hot on the 5th floor when the western sun is coming in during the afternoon. I can imagine it might be lovely during winter but it's hard to sleep in summer when it's too hot and too bright! The mattresses are super comfortable though, and it's nice that there are bedside lights.