I used ARES last trip and it worked similar to Getaway today. Get a voucher, bring it to the ticket booth (I did this day before we were going into the parks) and get tickets. It's a little less than Getaway Today, however, GT offers 2 mm's on 3 day hopper, ARES just the one (like Disneyland). That didn't matter for us since mm was only available on one day of our trip anyway.