As others have said Breditz and Nadja are super nice. Their full time gig is taking care of guests, so they are good at it and very much there for you. The room and apartment is very nice. Take their food and tourism advise, they have directed hundreds of guests around the city so are very experienced.

Also, if Nadja is still offering it, I suggest you take the paint dance class with her. Nadja is a hip hop dancer so will be the guide, but the point is just to free dance and laugh. They have a room in their apartment (separate from the bnb) that is just used for throwing paint on the wall (how cool!). Basically you wear a paint suit and do some dancing while throwing paint from your hands. It's super fun and silly, like you're a big kid.