Yusuf and his Brother were very kind and helpful. They gave me the key the hour I made the reservation. The room was spacious and clean. It's located in Karaköy at 5 minutes from the tram and from the ferry. Moreover, it's a quiet place in a crowded and an animated neighboorhood. If you want a place to rest and to be in a gret neighboorhood, I recommend Yusuf' airBnb.