The big catch to that is if you have anything on that card other then your Disney trip it doesn't work. Whatever you pay on the balance will go off the Disney Balance first. Then you are going to be paying finance charges on the parts that are not Disney related and will continue to do so until you pay off the Disney portion, so in affect you do indeed pay interest charges for as long as you have a balance after the first payment and something other then qualifying charges are present. In order to take advantage of the no interest is 1. pay off the entire Disney portion on the first billing (1 month not 6) or 2. Pay the entire thing off on the first payment or 3. don't have anything else on the card that doesn't have an Disney address for charges. That you can just let sit there for the 6 months with no interest. Also, be sure that the balance is paid before the 6 months with sufficient time so that nothing can get credited after the date otherwise you will be charged the entire interest for the 6 months. One of the Banks little ways to keep the bankers very well paid.
I have one of the Disney Visa Cards and I use it exclusively for onsite purchases. Anything that you spend anyplace other then onsite will not qualify for the finance forgiveness. Like I said, even buying a candy bar offsite will switch the whole thing over to plan B and if you don't pay it all immediately the finance charge will come charging back. In other words, if you have a balance of say, $1000.00 before you charge your Disney Vacation. When you attempt to pay on the 1K it will bypass that balance and only reduce your Disney "free of interest" balance, leaving that high cost charges there to continue to collect finance fees until all of the Disney charges are paid off.
It was my stupidity the first time. I interpreted it to mean what I spent on a Disney Vacation regardless of where. Example... If you spend 2K for airfare to Disney, it is not part of the no interest deal unless you buy the airline tickets via Disney, usually at a much higher rate. Don't put independent airfare on the Disney Card. Yea, I should have known better, but I didn't think about it that way.