Orkun's place is just as described except for the views. There are no words to describe the beautiful views from the apartment. The apartment is stylish, and has all the amenities one needs on the trip. It's close to Taksim and is easy to get to there and then to other places from Taksim.
Orkun is an amazing host. He respond quickly and is extremely helpful and hospitable. I would definitely recommend staying here and will do so next time I'm in Istanbul.