The one thing that people aren't talking about is ticket prices. We've bought 10 day non-expiring hopper passes. The cost per day is peanuts compared to even a 5 day pass. If you usually buy passes to encompass a couple of trips and decide to do the
DDP, you'll lose that cost savings. Also, if you usually stay offsite and pay nowhere near WDW resort rack rates, you'll lose that savings.
Now if you always stay onsite at a value resort, always only buy tickets to last one trip and tend to only eat counter service, you'll do well. Paying rack rate on a deluxe wipes out the savings from what I have calculated. Buying 5 day tickets instead of 10 day tickets covering 2 trips wipes out the savings.
So consider your needs before you purchase. The DDP doesn't work for our family but it may for yours. Also, with all the hoopla about the kids' menu, you should carefully examine that menu before purchasing. Purchase at the last minute so you are fairly sure of what your child will eat.
Good luck with your choice.