The apartment was great and very clean. Plenty of room for 2 people and very, very quiet at night- you're guaranteed a good sleep! It's based in a quiet part of Kreuzberg with a park opposite (you'll need to get the U bahn to somewhere more lively). Though I couldn't get to meet Tanja, the key pick up was organised very well and everything was very easy. I'd recommend this apartment a lot - very good value.