Philipp and Anna were extremely responsive. The hot water wasn't working and it was fixed within 30 minutes of my bringing it to their attention. The location is excellent and the apartment is clean. It did however have a very strong smell of cigarettes, which was impossible to chase even after opening the windows (with the heating off) for an hour. I feel the apartment should have stated "smoking apartment", as it is exceedingly rare that people smoke inside these days. If you are a smoker, I would highly recommend Philipp's place to stay.