Eric & Gini were great hosts! The apartment is incredible -- it looks exactly like the pictures! Very clean, bright, well decorated, and spacious. It had everything we needed for our stay (pantry basics in the kitchen; hair dryer and extra amenities in the bathroom; washing machine; speakers to hook up our ipod). The unit was incredibly quiet and the bed was very comfortable. The apartment was also heated with radiant floor heat so we were very comfortable (we visited in October).
The apartment was very easy to find coming from the closest S Bahn station. The building is on a very quiet street and is in a great location! It's very easy to get to cafes, shops, markets, etc. We would love to stay here the next time we're in Berlin!!