We can highly recommend this place and Jack!
My mom and I spend three nights in Berlin, and even before we came into the city, Jack had given a very good impression and seemed very nice and helpful! Getting there from the Hauptbahnhof was easy (with his directions) and the area of Prenzlauer Berg fell in our taste the moment we came. It’s quite, clean, still hip, nice places to eat and interesting people to look at ;) the apartment was really nice! Clean, aesthetically pleasing, airy and bright. We loved the plants! Even though we were a bit intimidated by ‘Patricia’ (also a plant). Jack is cool, nice and easy to talk to! And he gave great advice on where to go, places to eat etc.