Simona and Wolgang are very friendly and helpful. When you have questions, they'll respond right away.
The location of the apartment is perfect - there are 3 supermarkets (two bio, one regular), a few coffee shops, and many restaurants, and a park within 5-min walk. As other reviewers noted, it's very close to the public transportation.
The apartment has basic kitchen stuff and a nicely decorated bathroom. The bed is comfortable. I couldn't ask for more.