Really VERY-VERY good apartment!
I stayed at Javier’s place together with my colleagues. We all liked it a lot! The apartment is very nice and clean. Also it is very close to S-BAN. Javier was hospitable and did everything to make our stay comfortable. He was always in touch and answered all questions that arose during our stay very quickly. Our first time in Berlin and we had really good impression about our trip. No doubt one of the reasons for this is our excellent conditions of stay. Javier, thank you a lot!