We had a wonderful week in the middle of August in Berlin. The apartment is lovely, airy and has everything we needed. Really important for us is the kitchen which is really well equipped. The bed is very comfortable, I'm a tall guy, and had enough space for my legs. :) There is a space in the hallway of the building where you can park your bikes safely.
Also the apartment is located really well as it has U and S bahn around the corner around 300m away, and it is also the station for the ring s bahn which makes it perfect to jump in with your bike after a long day of bicycling and come back home from any direction.