If you are a tourist and want to go by there by metro from taxim , you should go to ITU station and from there get a taxi or use dolmush to istinye parkshopping mall.
It s easy to navigate inside the mall. Even if it is in one of the richest providence in Istanbul, stores usually have great deals. Gotta check this one out!
This is a good mall to visit in Istanbul ! The only bad shop for me is Vodafone, all the shop people are having bad service attitude. Only one nice guy helped me. Too bad I did not know his name!