I really liked the apartment. It is a two bedroom apartment, with a nice living room, a complete kitchen, washing machine and dryer, and WC separated from the shower area.
The windows are big and there is a lot of light entering the apartment. The views are nice too. In the back, you can see the Sony Centre and also the balloon (Die Welt) when it is up. There are a lot of shops around and if you prefer to walk instead of taking the subway (there are two stations nearby), it is completely doable.
It is located on the top floor, so always expect some stairs even when using the lift.
I would highly recommend this place!