Beautiful building with a nice courtyard. Amazing natural light, huge windows with incredible soundproofing. Klaus was a good host and helped fix some issues on the day we arrived. It's not a huge place, but plenty of space for staying w/ two guests for a few days.
The only problem we had was that the Wifi router for the unit was broken when we were there. We were able to use the Wifi from the next-door unit so it turned out OK, but may not be the best spot if you definitely need fast reliable wifi.