My girlfriend and I had a very nice stay at Alan & Kasia's apartment. Very clean, bright and fully equipped. Very quiet neighbourhood, with Kaiser, bars and bio markets. The studio's situation was indeed at 100m of the s-bahn station and the tram m4. You can freely join the center, walk in the city and come back at any time at the apartment really easily. Small inconvenient were that the flat was cold when we arrived and there are not much heaters (two: one in the bathroom and one near the kitchen). Also, there is a little sewage smell in the bathroom. However, these are small details and to us, the quality/price ratio was very advantageous. To sum up, it was globally perfect and exactly what we hoped. Thank you Alan & Kasia!