Karstens flat was great. The pictures dont do it justice. Loads of space, great kitchen & bathroom. Was in a quiet location but only a quick 5min trip on transport into the centre of berlin.Good late night grocery store & restaurants close by. Traditional berlin bar/resteraunt just around the corner which was really nice. Karsten is a lovely guy, and gave us plenty of suggestions for our stay which we followed and enjoyed. I would definately recommend his flat.