We very much enjoyed our stay and Gernot was very flexible with the check-in and check-out times (he allowed us to come 4 hours earlier than planned and we could leave anytime we wanted). The apartment had everything we needed and was clean and quiet.
The only downside were the beds, which were located in pull-out closets and squeaked with every move we made in our sleep. We solved this by putting the mattresses on the floor for the following nights.