This was our first time using AirBnB, and we couldn't have had a better experience. Gunter was really friendly and helpful. He offered us a few good suggestions for places to eat nearby, and organised for us to collect our keys, even though we were arriving late into Berlin.
The flat was as described in the listing and easy to find, and easy to get to via the subway. A really brilliant location.
Overall, we really enjoyed our stay :)