Overall I would definitely recommend! The location is amazing, right in the middle of Kreuzberg. The room is huge and comfortable! It has a big desk, a sofa, a big bed, etc. The apartment is very well decorated, the bathroom and kitchen are very tastefully decorated. The apartment is in a second floor, so that's convenient too. Chris was kind enough to let me use this iphone charger since I lost my AC Adapter. Also, I recommend renting a bike from Club Veló, only 2 blocks away from the apartment. The host had one rule I found a tad unusual which is for men to pee sitting down, but maybe that's just me. Overall I would recommend staying at Chris' apartment, you'll have a great experience in Berlin.