We love it, and find it totally worth the money.
We buy when the offers come out, so booked in April last year for October this year. We are staying at Disney in a moderate resort, so got free quick service dining, a $200 gift card and the Memory Maker photo package included.
We have been many times, and find that we don't need to spend any more money, unless we want souvenirs and a few dollars a day for tips for Mousekeeping. We use Disney transport so no parking charges, but when we did hire a car it was free parking at Disney if you stayed on site anyway.
It isn't the only type of holiday we go on, it is one of several types we enjoy. What we enjoy about Disneyworld is the way everything is done so well, the level of detail and customer service is astonishingly good. The four Disney parks and the Disney Water Parks are superb, and all are very different.
We never go to Seaworld or Discovery Cove because we disagree with keeping the animals in captivity.
Before I went the first time I was very anti the idea of a holiday at Disney. I was completely wrong. It really has something for everyone. I will never forget DD's first trip there. She might not remember it (she was 2) but she enjoyed it immensely and I loved watching her enjoy herself. I can't wait to go back in October!