I have booked several Disney vacations through Walt Disney World Travel Company (the folks you reach when you call the Disney number you see on tv and in print ads to book a vacation) and have LOVED dealing with them. I know that most people prefer to book a trip through their own travel agents, but I will say that without a doubt they were better than any agent I previously booked through.
There are no "hard sell", no trying to rope you in to a pricier package -- they are there to help you get the vacation YOU want at the price YOU can afford.
I love the courteous staff, the ability to check on my reservation myself --if you book through a travel agent, *they* own the reservation, and you have to go through them -- if you book straight through Disney, you can check on and change things any time you want without a middleman (or middlewoman, lol) -- which is a feature I LOVE.
I really cannot recommend this enough -- I know some prefer their personal travel agents, but this is my preferred way of booking a Disney vacation.