You know the drill- bigger seat with food on a real plate. Drinks are free on MEX in economy and Executive class. Airport lounge is not a big deal. But I have found recent trip that flights are full and slow to leave. Making up front a better deal. Even in biz, I had to go to galley for new drinks as FA were chatting. I have found the prices between econony and biz not a big difference, look into buying biz ticket and saving 60K miles for a real journey.