David was responsive in terms of communication and checking in and out was easy and smooth. His place is spanking clean. The location is fantastic: easy to get around while the district is trendy yet peaceful. Many good eateries around and a nice supermarket around the corner too. The apartment is in a quiet building for a good night's rest if you aren't out partying till late in Berlin.
We had all that we needed. There wasn't an elevator to use to get to his apartment so this might be an important consideration for some.