I had a great experience at Ekaterina's apartment. It is a small, cozy and very comfortable place; We arrived very late, so she managed very well to give us the key at 1 a.m.! And she was aways very helpful...

The place is very well located, near to a a lot of u-bahns, s-bahn and bahnhof, bus as well. We had easy access to every part of Berlin. NEarby there's also a supermarket that opens at sunday. Awesome! I heavily recomend staying there :)