Every once in awhile you can find deals on Business Class seats. I was able to get a Business Class seat flying from JFK to Istanbul for about the same price as Premium Economy as part of a promotion. It was great because they have seats that completely recline and this was an overnight flight. I can't sleep only partially reclining in Premium Economy.
One of the best things is the Business Class lounge. Istanbul has a world-class lounge in their airport.