Very nice trip to Berlin. Klaus (for Josty-Brauerei) was very available the morning we arrived (especially when we had a key problem!).
The appartment is exactly as described. Very white and minimal slyle. Theres's all you need inside. My only concern was the bright light coming from the windows in the morning as there is no dark curtains...
Except from this, it's a perfect place to stay, very central in Berlin.