My friend and I had a lovely stay at Rainer’s place for 6 nights— it was clean, cute, bright, and fully functional. The stairs are no joke— sometimes I would walk down and lose my train of thought completely and then come back to reality and realize I had done all of that and was still walking down the stairs. But they’re really not that big of a deal, and the flat is so lovely that even if you don’t like stairs it’s worth it. And such a great value. I would love to stay here again if I ever came to Berlin.