Berna is a fine host. She is quick to respond and very helpful. Car service from airport was arranged and a minor problem at the flat was promptly repaired. The welcome chocolates and bottled water were a nice touch. The flat is as described, very nice and clean. Be aware the flat is four flights of winding stairs up and a steep hill climb away from Taksim. Old town and most sites require transport but metro and tram are nearby.