First time in Berlin, and staying at Jan's place was perfect for my boyfriend and I. It is located within the streets of Kruezberg a couple of minutes walking from the U-bahn. However, we did decide to walk around the city throughout our time there because of how beautiful the scenery is.
Jan's place is spacious enough for 2 people, well kept, and clean. Although I never had a chance to meet with Jan (we were greeted by his lovely mother in law, Gina) communication was very thorough and timely, which made the checkin/out process very smooth.