CK is really a friendly and passionate host. To be honest, living in Berlin for months, I was shocked when I was greeted with such passion! The apartment was elegant and delicate. Bring some CDs and play them in the room! The CD player is connected with speakers in the bathroom and kitchen. The location is just perfect. You will find yourselves within 10-min walking distance from the central train station and many popular sites. Btw, I found a truly authentic Ramen restaurant nearby...I forgot the name. Hope you can find it as well:)