Patrick's apartment is a fantastic home base for your explorations of Berlin. It is very well-located; we purchased rail passes for our stay and ended up using them very little since most of our sightseeing destinations were within reasonable walking distance. Groceries, pharmacies, light rail and subway stations are all close by. The apartment is masculine-chic (loved it) with everything you need and nothing you don't. We were three people and that was a comfortable number for the apartment size. There are three bedrooms but just one bathroom. There is no A/C (it is not common in Germany like it is in the US) but we all slept comfortably with windows open. It is a subterranean apartment which helps to keep it cooler in summer than most. When I received the unconventional instructions about how to get the key, I was concerned I had made a mistake with the booking, but rest assured, the system works and is completely legit. Patrick and the management company were very professional and responsive to all of my questions! I would book here again on my next trip to Berlin.