We went as two friends used to our own space and this was perfect. The apartment is large, clean and in an ideal location to easily find your way around. Views are spectacular! The Tegel airport bus stop is just around the corner and the S-bahn with a direct line to Schonefeld airport, Alexanderplatz etc is 3 minutes away. Trains run for almost 24 hours, so very light sleepers may want to bring ear plugs if you like the windows open. There was a heatwave during our stay, but thankfully fans are provided. We didn't cook meals as there were so many options for eating out nearby, but perhaps a few more wine glasses and utensils could be provided in the kitchen i.e. a spatula? There are 6 comfortable single beds in 3 rooms, the 2 showers have strong pressure and WiFi is good. Communication and access worked well and I would definitely recommend this as a base in Berlin.