By the the nicest Airbnb I've ever stayed in.
Location - excellent transit to central Berlin and both airports by train/tram and by bus (which are always on time!)
Hosts - fantastic hosts who were incredibly welcoming with checking in and out and any help we needed throughout our stay including fantastic advice on clubs and bars
Apartment - top of the range modern apartment with every furnishing you could imagine. Easily slept our large group of 6 in real comfort. it could sleep up to 10 without being crowded.
10/10 would recommend to all