Gorgeous apartment in a good location - just a few stops on the S bahn to the main attractions in Berlin.
Stef was a great host, giving very quick responses, easy to follow directions to the apartment from the airport and when we checked-in she offered suggestions for places to eat and drink locally.
The apartment is huge with big and comfy beds and all the amenities you would need, including a powerful shower, hairdryer and hair straighteners! There's no a/c and we could have done with a couple of fans in the apartment as it was quite warm but I'm sure Stef would have supplied some if we had asked (we never got round to asking though!).
There was a bit of noise from the hostel and S bahn, which runs right past the building, but usually by about 11pm it got quiet so nothing unexpected (but possibly not the place for very light sleepers).
Overall a really great airbnb and would happily stay again and recommend to friends!