Great apartment in a wonderful location. There's nothing you can really complain about. The place is really clean and you can tell Alex pays a lot of attention to it. He also wants his guests to - you'll find sheets with rules up throughout the apartment. The bed is a twin which can be a bit small if you're somewhat taller and you might find yourself with your feet sticking out overnight. I would definitely want to return here! It was one of the best places I've stayed at in Berlin.