Innovia is a good product but it has much competition from other developments, all of which are worth a look. There is so much going on in Istanbul with all these new 'satellite towns' that are springing up, that it is very difficult to decide which is best for you without visiting. If you are seriously considering investing in Istanbul, my advice would be to plan a trip and look at a number of the new developments on offer.
Here is some information on the
investment property in Istanbul