A pretty nice and roomy 2-room (one bedroom) apartment in a new building very close to Spittelmarkt underground station. Location is pretty central and very convenient, next to U station and just south of the Museum Island. Got my key through a locker on the street next to the apartment, worked very well; upon departure just left the kyes on the table and shot the door behind. After some initial hiccup (the owner was very responsive and service minded) Internet connection has been fixed and worked quite well and stable. There is a washing machine and a dryer at the apartment - which is very convenient. Didn't use the garage/parking space, can't tell how it works, there is a big garage with marked spots under the building, accessible through staircase/elevator. The apartment is equipped a bit on the scarce side (kitchen utensils, lighting, furniture in the living room), but this is not really dramatic, especially for a short stay (I stayed nearly a month).
Overall, a pretty nice and very conveniently located apartment, highly recommended for a single or a couple, or perhaps a family with one kid.