When I did a side-by-side comparison, I was ableto save myself $452 by booking on my own, and buying tickets from an approved 3rd party ticket vendor. Well, maybe $400, since I suppose there is some value in the "freebies" from Disney direct (lanyard, pin, luggage tag, coupons?).
For budget minded trips....
Tickets from Last Minute Travel Club (Google for a free membership code) are typically about $30 less than other discount vendors, however Get Away Today has Adults-at-Kid's-Prices right now, so that could even things out.
We stay at Desert Inn and Suites. Clean, cheap, and seriously close. Comfy? Enough for most people. Generally around $140/night for a 2-queen room. The earlier you book, the better the price.
Flights are a bit of a variable. We fly from PDX and rarely pay over $100 each way.
Point being, with a little planning, it's pretty darn easy to book yourself, and significantly cheaper! Do check for cancellation policies, though!