Best thing is definitely the location. Very central, very close to restaurants and cafes and very close to the underground trains. The place is compact, but everything you need for a short stay. Windows are right onto the street, so if traffic or street sounds are a problem for you I would not recommend. Everything was very neat and tidy, only thing was that there was a thick layer of dust on the tops of anything above eye level (dividing wall, frames, light chords etc). Karsten was very easy and friendly to communicate with. I would definitely recommend him and his place.