I don't wanna write a big big comment, but everything was FINE.
We checked in too late and Mustafa was there waiting for us (1am) THANK you again. Communication was good, the flat is just like pictures , a very nice duplex near to metro (marmaray) and you have EVERYTHING you need in this area, 2 malls (5min walk or less), resturants, coffees... I recommand it!