We booked through them for our '07 trip.
Ultimately, price-wise, we could have done better just booking the hotel at an AP rate (we knew we were upgrading anyway) and buying the AP. But then, it was good for us to know what a package deal was like...
You can only get ToonTown Morning Madness vouchers if you book a package via an agent that uses WDTC (so Costco,
AAA, disneyland.com are the biggies for that) or if you buy them on ebay (not worth it IMO) or plunk your name on the big list we have going here and hope that your name comes up before you go. We went, we were "family of the day" for it, and it's really not that big of a deal. Little song and dance, then off you go to the two rides or into Mickey's house to meet him.
The Aladdin priority seating...it depends on when you go, but we used our vouchers for that in early December. We had to check in an hour or so early, then come back and we waited in the preffered seating line for ages. The standby line people went to their line later and got in FIRST. Then the seating area is the "orchestra" seating area, which means that you've got things going on up *above* you, which is NOT the best way to see the big elements of the show! I would go for the standby line in the future, and sit up in a balcony, to get a better seat. The Animation seating thing (and Turtle Talk) went unused, as there was simply no need. We've never had to wait more than one "cycle" for either of those things (the seating voucher wouldn't get you into a show that already started anyway so you'd still have to wait if you walked up just as a show started), and we've now gone to the Animation Academy at nearly all times during the year...Dec, Sept, March, May, June...
However, I know these things b/c I did the package deal!
Costco's prices were about even with the costs of the other packages, taking the included character meal into account. At that time, for the pckage I was booking.
YOu have to go through and figure out where you want to stay, when you want to go, and how long you want to be there, and then figure out the prices for your exact stay, to determine what's the best deal for your own vacation. Why? Because others have found Costco to be a better deal than the rest, while others have found it to be a bad deal, and it all depends on the exact, specific vacation you are taking. So do the homework, including booking things separately, and pick which one is right fo ryou!
Little hint, though, when you find what you want and the price is right, BOOK IT. I waited just one extra night...when I woke up the next morning and went to book, everyone's prices had gone up across the board.

And this was booking in March for a September trip!