David was very nice, quickly reply on messages, provide us with a guide where to go in Berlin. In addition, he met us a little early that check in time, so we could leave our luggage before going to explore city.
Location of the apartment is approx. 40 mins by bus from airport. Additionally, there is a night bus stop near the apartment (very helpful if you have a flight at night). To go to the city center you need to go to the nearest bus stop (3-5 mins), have approx. 5 stops on bus, and then go to uban from there. It takes up to 1 hour to get to the city center.
Apartment itself was good, but not exactly what I expected from photo (photos are not up to date), and probably because it is the ground floor, there is odor. What I really liked is kitchen which is fully equipped. Furthermore, there are such things like tea, oil, sugar, and even rice and pasta. Dishwasher is great addition.