We were looking for a place to stay in Kreuzberg and Jan's flat was a nice option. At first, we were worried that there was no kitchen, so we asked Jan if he could provide us with a kettle and a fridge. Jan gladly promised to do so.
Jan answered all our questions from the moment of booking and throughout our stay in Berlin quickly and and politely, he organized our "check-in" despite not being at the place at the moment and even left us tea and coffee which really moved us.
The flat (on the ground flour with a few stairs leading up to it) is clean and comfy, the same can be said of the bathroom.
We definitely recommend Jan's flat for both couples and those travelling alone as a great option for short stay in Berlin. We will gladly stay at his flat the next time we visit. Great location and beautiful area for comfortable living.