We were 3 girls staying in the apartment for a week and we loved it. The apartment is spacious and has all the utilities you need (including wifi with great connection) The area is residential and quiet yet close to many nice restaurants in Kreutzberg. The metro stop is also nearby so there is good connection to the whole city as well as to the airports (we travelled from Tegel) The communication with Gert was fast and as he also lives in the same building, it was easy to reach him during the stay as well.