[Barrin92]

Yep I have and it were some of the most fun times of my life. Every 10 million pop. city has terrible traffic and problems, including those high on that list, and all of their residents think they suck in some sense.

But unlike a lot of the high income expat enclaves the Economist chose to put up in the rankings Istanbul also has genuine culture. It's the most actually cosmopolitan city in the world as far as I'm concerned.