For CET you are allowed a one time tier match to Diamond if you are MLIFE gold. It must be done in person. Go to a CET rewards desk and say you would like to get tier matched. (you'll need a CET account so if not you'll have to sign up as well) They ask for your ID, CET rewards card, and your MLIFE gold or higher card to verify. They check the system to see if you've done that type of match before as you can only do it once. The match takes about 5 business days to complete but i would see if you can get free show tix. You will be diamond for the rest of the rewards year. For CET that ends in of Jan next year... So the best time to do it would be in Feb or later... If you get matched in November, you will only retain diamond for 3 months until the end of Jan... Diamond gets you free resort fee (basically $40 off each night), spa passes based on the property, express lines, free valet, and 2 show tickets per month (not any of the colesium or zappos theater shows, just the small magic and revue shows), you also get a $100 restaurant credit for a one time use, they call it the celebration dinner You should get matched in your may trip and in Dec you can use your $100 celebration dinner and see a show. The free show tickets can only be reserved the month you want to see it so you can't book it ahead.