Irem's apartment is great. It's not exactly a duplex, the entrance leads to stairs which leads to the apartment. It's on the top most floor of the building and has a private balcony with a nice view, and that is where we spent most of our time. Kudos to Irem for the decor, it gives you the feel of a New York city apartment with red brick walls overlooking the windows from the bed. Would definitely recommend this place. Location was perfect too, 10 minutes walk from istiklal street and 7-8 minutes from sishane MRT, around which there are some great restaurants.