Norberts apartment is beautiful, the pictures don't do it justice. It's tucked away in a quiet little neighbourhood that is minutes away from two train stations and has good bus links. The neighbourhood also has a few lovely wine bars and restaurants that are definitely worth checking out if you're exhausted after a long day of sightseeing, locals are very friendly and we felt very safe there. Norbert is a fantastic host, super friendly and accomodating, he was always quick to respond if we had any questions and was amazingly flexible checking us in after a cancelled flight meant a later than expected arrival. Would highly recommend both our fantastic host and this wonderful apartment for your stay in Berlin.