Anatol's apartment is located in a quiet and very safe area with a lot of supermarkets nearby, and the main street is really close too (5-10 min on foot). There's a bus stop reachable in 4 minutes and the S-Bahn in 8 minutes, in 25-30 minutes you get to Alexanderplatz.
The apartment has everything you may think of and need for a short and long stay (kitchen supplies, bedlinen, towels etc.), the only thing we didn't like was the bed, which makes a lot of noises, but other than that everything else was good.
The building is all in all quiet, but we didn't have any problem with neighbours while strumming on the guitar/singing from time to time.
What we loved the most is the availability, friendliness and patience of Anatol, every single time we had an issue we knew we could contact him and he would respond immediately and fix the problem!