It was a great pleasure to stay with Ralph. The correspondence before we arrived went smooth, and the host responded quickly to our requests. We arrived late on a Friday night and it was no problem to get the keys handed over (at. 22:30 / 10:30 PM). It was not Ralph we met, but his very nice upstairs neighbor who was very helpful. We had to leave late Sunday, and we were allowed to have our luggage in the apartment until we left for the airport (at. 17:00 / 5:00 PM). We were 8 boys who had gone to Berlin to visit a friend, and the apartment was brilliant for the purpose. 3 bedrooms (2 double, 1 with 2 single beds) and a double bed in the living room tucked behind a room divider. Kitchen and bathroom worked flawlessly. Close to U-bahn (metro). All in all an excellent base for a weekend (or longer stays) in Berlin. I can unreservedly recommend the place to others.