I have one. I'll probably dump it soon.
I've said this before in other threads but I don't see the benefits.
1) The interest rate really isn't competitive. Yes, this doesn't matter if you don't carry a balance but if you get into a jam then you're suddenly paying a lot more in interest compared with other cards.
2) The rewards aren't so great and are tied to Disney. You're getting 1% back and you have to use that 1% at Disney. Why not just get another card and get 1% (or likely more) back where you can use it anywhere?
3) The discounts at the parks are a pain to keep up with. If you go to any random store in the parks and flash your Disney Visa and ask, "Hey, do I get a discount here?" You'll get a, "No, it works at the World of Disney at Downtown Disney, though." So, yes, you get 10% off at the World of Disney. The discounts (and I have the same complaint with the annual pass) are available at some places but it's not frequent enough to where it makes any sense. You get to the point where you don't even ask and you're not likely to keep a list in your pocket so that you can go out of your way to save the buck.
4) I haven't received any special 5-for-1 offers on spending to get extra points. I know others have. I don't know how frequent this is. If it's frequent enough and you go to Disney World a great deal then I could see how this would work to your advantage. Suddenly you're getting 5% back and in practical terms you're using it on something you'd be spending your money on, anyway. This would need to be really frequent to make it a real benefit, though, not a once a year for 2 months kind of thing.
I think the main benefit of the Disney Visa is the feel-good aspect. I have one because I received $100 gift card for applying. I thought that there would be discounts at parks/stores, etc. (and there are - it's just not universal enough to where you'd use it). I really think the appeal of this card is the Disney brand. As a practical comparison of this card with just about any other would leave you thinking, "Oh, I'm better off with another card..."
I think the only real benefit I see is if you do the 6-months to pay for a Disney vacation and then I'm not sure how you link that with your card unless you use Disney's website/travel service (not getting a discount there) or maybe AAA (I think this works as I remember bringing this up before and someone saying that they had tried it and it worked). Anyway, my thought is that you're probably better off having the cash in hand to pay for your trip rather than using the 6-months to pay deal as a general principle. Then you're not carrying the balance and you're not leaving yourself with being caught with having all of that interest added in if you miss paying it off in 6 months (which is what they're gambling on). Seems to me that if you have 6 months to pay and you think you could do that then you could have just saved up for 6 months prior to your trip and then pay for it all with cash. Also, if you're going to finance it, it seems like you'd be better off not playing the retroactive-interest game and just putting it on a lower-interest rate card.
I know - but it's a Disney Card...
We received a 10% discount at all Disney run stores on purchase over $50.00 including tax. Plus discount on Disney.com. The best thing is we get 2 Reward card (like credit cards) we give then to our girls for spending money. We tell them this is all they get so don't ask for anything when it runs our. We also retain veto power. The cute card get's a lot of people asking me about Disney. 
I also applied for the Expedia Mastercard and got an instant $50 off my bookings and that was 0% for 6 months as well. 
I want to wait till we actually GO on the trip just in case I need to cancel. Then I won't have to worry about being reimbursed from my Visa if it's paid up. 
