Some of the perks I can think of right off:
-The Disney Visa occasionally runs promotions that are exclusive to DV card holders. Frequently new promotions open to DV card holders first, like the annual "free dining" promotion - we get to book several days ahead of the general public.
-For every $100 you charge, you get 1 "Disney dollar." They accumulate and when you're ready to use them, you get a special Disney Visa Rewards Card that you can use to pay towards your trip or use almost anywhere in the parks for food, souvenirs, etc. Sometimes they run specials where if you spend over X amount, you get 5x the Reward Dollars.
-You also get 6 months with no interest to pay for your WDW vacation package.
-You get a small discount at World of Disney at DTD, 10%, I think.
-There's a special meet-and-greet with the characters at Epcot just for DV card holders and you get a free 5x7 Photopass photo from it.
-There are occasionally other promotions, like discounts on Disney Broadway shows like Mary Poppins, Lion King, etc.
Overall, it's an OK credit card to have. I like getting the Disney dollars and also having a credit card with Mickey & the gang on it.

If you are one to carry a balance, though, it has a higher interest rate than some others.