Kathi and Peter's place is in a good location, close to Westbahnhof station.
The building is very quiet (good neighbors) so we had a nice and relaxed evening. The apartment easily fits 5 people.
Peter greeted us when we arrived, showed us the apartment and even provided us with tips for the city!
He ALWAYS replied very quickly to my messages, which was a big help.
Can only recommend them and their place.