Katharina's spot was perfect for my solo adventure to Berlin. First of all, she was so sweet & beyond helpful with treats & transportation tips upon my arrival. She even carried my luggage upstaris! Her flat is super clean, with plenty of space in the room (the bed is HUGE and so comfy). It's on the third (fourth, for us Americans) floor, but that wasn't a big deal for me. Her apartment is in a charming & safe neighborhood - I walked to breakfast every morning at a different cafe, and it was only 7ish minutes to walk to the U-Bahn station. Overall, my 10-day stay was perfect because of Katharina and her wonderful home. Highly recommend, especially for solo travelers!