My wife and I stayed at Askan's place for a month after moving to Berlin. Couldn't have asked for a better place to start our Berlin experience. Askan went out of his way to help us on anything we needed, and is a great person to interact with as well.
Location: Within walking distance of Moritzplatz station, and bus stops. Its not the busiest streets, and is quiet once in the apartment. 3 grocery stores within 5 mins walk. A couple of cafes on the street, but within a 15 min walk, lots of restaurants and bars. Pretty nice to walk around, and a safe area.
Apartment: Very modern and open design, so perfect for a couple. It was just as the photos suggest. We had everything that we needed for our stay, including kitchen items, towels, vacuum, iron, etc. The internet is pretty good, and there's a great sound system connected to the TV. Has a nice balcony with a view to a large common area between neighboring buildings, can also see the Berlin TV tower sitting there. In short, we had everything we needed for the month.
The host: Askan was a wonderful host, very quick with responses, even when he was traveling internationally. He received us on the first day, and offered helpful suggestions for someone new to the city - registration, good bars/restaurants, areas to explore, etc. Through the stay, he offered help on everything we needed.
Highly recommend Askan's apartment!