I would literally buy this apartment for myself if I lived in Istanbul :) It's gorgeous! And I love the terrace! Apartment layout is very good too. Interior design is just awesome.
I loved the sound system, I didn't even know I need one, but it was so great and fun to enjoy my own music on the good equipment and not in the earphones!
You can ask Özgür or Naomi for big bottle of water, it's for the reasonable price and you wouldn't need to drag up heavy bottles to the 5th floor.
The only flaw I could think of is the absence of washing machine. It was in the description on AirBnb, but it's actually a dishwasing machine. I really don't think tourists could have so much plates to wash, but in a hot and dusty city such as Istanbul a washing machine is highly important, I usually wash my clothes every day. It was very inconvinient not to have one. And there are no iron too (but it wasn't in the description so I can't complain about it). I think the owners should fix the apartment profile.
But overall it was absolutely great expirience. The apartment was so cosy and beautiful thar I didn't even want to go out! :) Thank you, Özgür and Naomi, for the your hospitality and this wonderful place to stay!