The apartment has everything I needed for my short stay in Berlin and even beyond. The kitchen is well-equipped, the dining room has a lot of space and even a large TV with Netflix (in case if I had to stay at home and get bored). I enjoyed having my morning coffee on the chair in the inner yard where you can get right from the dining room. The apartment is stylish and nicely decorated, the bathroom design and part of the furniture are hand-made. There is one little detail that became a surprise for me - the washbasin absence in the bathroom. If you (like me) are used to brush your teeth after your breakfast, it is not very convenient.
The apartment is located in a residential area, pretty close to a subway station. There are few shops nearby, including Lidl, and some cafe and restaurants. It is just 10-15 minutes walk to the Tempelhofer Feld - a huge park that is created on the place of former military airfield. Walking by the [former] runway is a great experience :)
Markus is very helpful and nice, I'd definitely recommend the apartment, if you're going to stay in Berlin.