It's a highly unusual place, full of electronic gadgetry in various interesting forms, especially in regard to the lighting. I've never been to a place in Berlin where I could turn on/off remotely from the bed all the lights around!
Daniel is a very nice guy and caring host, the rooms is prepared with extras comparable to a good hotel room.
He could use a bit more organization however, as he's doing lots of stuff in the place upgrading it and seems distracted.
Anyway, it's a very interesting place to visit for your stay in Berlin!