Rainer's apartment is pleasant, spacious, had a lot of old-style atmosphere, and is a relaxing place. I had a nice time there - the room is large, and the lounge and TV rooms (which are almost always empty of the other house inhabitants) were nice spaces to hang out in. Rainer was very helpful and easy to communicate with during my stay, and was happy to help out with anything required. For me, this even included sending me my jacket by post after I forgot it in the apartment! Really nice. Finally, the fantastic location of the apartment cannot be overstated - within minutes from the main sights, an U-bahn stop, and a rent-a-bike station. Also it is right in the middle of a nice going out out area for the evening, but without being noisy at night - perfect!