Alan and Kasia's apartment was perfect for our short stay in Berlin—Prenzlauerberg is a perfect neighborhood to stay in, not too touristy, full of great cafés, parks, and restaurants, and a minute away from the U-Bahn for easy access to the rest of the city. The apartment was beautiful and clean, and they also provided an amazingly comprehensive list of recs for eating, drinking, and touring in the city. Would definitely recommend!