Amazing time at Karsten's apartment in Berlin. Super close to the underground public-transit station. We had no trouble getting around in Berlin via this way, so it was nice having it close. The apartment is well suited for travelled, all the amenities one could need are available, and Karsten is very accommodating. He also is knowledgeable about the area and he helped us with where to get bikes, what good museums to go to, etc. I will definitely be staying here again.