It was great staying at Holger's apartament! The location was just perfect (1min to central station, veryy close to meatpacking district, 2min to Tivoli, and walking distance to pedestrian area).
The apartment is really lovely and very comfortable, full of nice art pieces, wonderful books, very nice deco, and so much natural light, as well as a small balcony. Also it is very well equipped.
Holger was extremely nice and helpfully, giving us a lot of great recommendations, as well as maps.
I would definitely stay here again!