Markus, and his flatmates Timo and Joanna were incredible hosts. They are all very friendly, helping, laid back and liberal. Having them as my hosts definitely helped my stay be amazing.
The room is just like described and pictures are accurate. There is even is direct access to the balcony from the room which is very convenient.
The location is great in a neighborhood that consists mostly of young liberal individuals and families of ethnic groups. Transportation was very easy as location is a 1 minute walk from both U1&U8 Ubahn trains, making it very fast to get anywhere in central Berlin. Nightlife in the neighborhood is vibrant and has many clubs, bars & restaurants to offer.
Communication was easy and at most times at least one of the hosts was around, and if not - Communication was easy and efficient.
I would recommend this place, it was the perfect deal for a solo traveler as myself.