Akira, when ordering, just add "az şekerli" (sketos in greek)
Jacques, you seem to know the place much better than me. Indeed, what I found striking in Kadiköy is the number of bookshops and CD shops, and the quality too... maybe Istiklal has become "too commercial". But that's from very limited experience - one week around Tophane, two days in Eskisehir and two in Kadiköy, half of which on duty.