I haven’t seen Holger but his friend Ekky was very nice and Helpful. Our communication with WhatsApp went well. The location is fantastic close to Ku’damm one of the most beautiful and prestigious street in Berlin . You have to use the Ladder to go upstairs to the sleeping area. For older people especially if you have a couple of beers , you should be very careful when you go to sleep upstairs. I was very satisfied with this place during my 17 days staying in Berlin.