Marc left us a clean and organized apartment, with a feeling of home. He is a lovely owner and helped us when we faced some troubles on the last day there. The apartment itself is very cosy and nice just as Marc described. It is about 20 minutes away from Alexanderplatz, Including waiting for the train to arrive.
The apartment fits to 2-3 people. It has no Wifi so you better come with your own internet connection, or purchase the "Vodaphone Wifi" that has a strong signal around the apartment and the building and costs 10 euros for a week.
We strongly reccommend the appartment, and sure will visit it again if possible.