Andreas is an awesome host and the room is impeccable. He contacted me a week prior with info and how to get to his place by S and U bahn.
The bed is a really cool feature! It's an automatic raising bed. The room isn't fully sound proof! you can hear your neighbors walk in the hallways, but it's not annoying. It's near a subway hub and good to explore Berlin.
It has some nice shops etc nearby as well.