This is, hands down, the cleanest place I've ever been to. No hotel even comes close. Everything was completely pristine.
Wahel is very friendly and understanding and the place has a very personal touch that makes it feel like a home.
The location is great and the city centre can be reached by S-bahn, U-bahn or bus in less than 15 minutes. Nevertheless, the neighbourhood has nice bakeries and other amenities.
Overall, I highly recommend.