Just back from a week's stay at Williams wonderful apartment, I had a great stay William has put so much effort to getting every detail right. it's an extremely comfortable and spacious. As someone already said the pictures don't do it justice. it's actually much better in reality- I loved it!
William kept in touch during my stay to make sure everything was okay; I had no issues whatsoever can't recommended it enough. the added bonus is that it's in my favored area of Istanbul with lots of antique, vintage shops and lots of nice cafes with a very good supermarket nearby for everything you might need for your stay.