This is a very nice apartment in a quiet, mainly residential area. The apartment has a quirky layout (each bedroom has two doors) but it is more than spacious enough for 4 people - we stayed as two couples and there was plenty of room for us to cook and socialise together, but still have enough space to relax separately if we wanted to. The main bathroom is big, but due to the lack of a window it smells musty. The second bathroom is pretty small, but overall the whole apartment is very clean. It takes about 10-15 minutes to walk to the nearest u-bahn station, but we found it very easy to access the rest of the city from there. There is a very affordable mini-mart nearby where you can buy groceries and other essentials. The restaurant opposite (where you pick up the key) is really nice and the staff are very friendly - we would recommend going there for a meal or a drink, especially if you arrive late in the evening and don't want the hassle of walking far from the apartment.
We didn't see Michele, but he left us plenty of recommendations of things to do/places to eat and drink, and was flexible when it came to allowing us to leave our luggage in the apartment before our late night flight. Overall, a very enjoyable stay and would highly recommend.