I feel that premium economy isn't really worth it. The computer doesn't recognize they should cost more, although you can charge more, but I've found in general its best just stick with standard Y seats. IPremium Y more of pain in the butt than anything else. Perhaps, if you have the money, just expand C class or just always use the default Y class fare. It would be one thing if fares for premium economy fares were set up on airwaysim to automatically have a higher price, but alas, the game does know the difference between Y and Premium Y. Thats been my experience. And the gain in CI was minimal at best. Others may have different opinions though, but mine is that premium Y isn't worth it.