We had a great time at Jörn’s place. The house was perfect for us(3 families including a kid). In fact the place was spacious enough to accommodate one more family. Jörn is extremely friendly and cordial and provided us with whatever we required. He also allowed us to checkin early based on our arrival times in Berlin. His house has a lawn and barbecue as well and pretty well connected (bus stop is a 5 minute walk). There are grocery stores within 10-15 minutes walking range.
Overall we had an amazing time and I would definitely recommend Börn’s place to anyone looking to visit Berlin for personal or official visits.