Normally the best use of frequent flyer miles is for international premium cabin awards because these are expensive tickets if you pay with cash but not very expensive if you pay with miles. (travelcodex.com)
Bottom Line: You will get the most value out of your miles when booking international premium cabin award seats. (upgradedpoints.com)
That's where the real value is when we're talking miles & points, especially when you're redeeming points for international premium cabin flights. (johnnyjet.com)