We really enjoyed are stay at Till's apartment. It is a real Berlin style apartment in one of the nicest neighborhood of the city (at least in my opinion, having visited the city many times). The neighborhood is totally safe, even though at a first appearance it might not seem so, as other guests have reported. We were driving there and we were lucky enough to find a parking place 1 minute walk from the apartment (we just left the car there for 2 days and used other transportations during our stay). We didn't have the "green sticker" that is apparently mandatory to display on the car, but we had no problems at all.
Communication with Till was great and checking in very easy. The apartment is really beautiful, the bedroom nicely decorated and spacious, the bed very comfortable. We didn't really cook, only had a tea, but the kitchen seems nicely equipped.
In conclusion, this place is fantastic and I would love to stay there again in the future.