I didn't use the kitchen nor did I get to meet Burkhard in person since I only stayed for a short night. However he seemed very courteous and willing to help over our e-mail exchanges prior to my arrival.
The only problem with the room is that one can hear the footsteps of the people using the Kitchen located just directly above.
Otherwise the bedroom and bathroom in the basement are small but clean and functional. Also, the mattress and one of the two pillows are made of top quality foam, which is quiet rare for an airbnb accommodation. As a result I slept like a log...until I was woken up by those footsteps on the kitchen floor upstairs.