The place was nice and relatively small, but it was enough for a short staying. Very close to Hauptbahnhof which was an excellent option for us.
Two negative points:
1. Bathroom was super smelly and very unpleasant to use. We didn't realize where the smell was from as it was visually clean.
2. The owner wanted me to give him 5 stars and mention negative feedback privately, which I think is not fair.