We always do early entry! You can usually complete Fantasyland in that hour. Or, ride RNR and TOT at MGM- a couple of times if you want, or spacemountain, or whatever your priorities are! We love EE- a great time to get our must-dos done at least once, and get a FastPass for later in the day.
This is a great feature- one of the major perks of staying on-site!