Disney World rocks

I don't know about Disney Land sadly. But it's great fun. Be sure to check out guides online, they will give you all the info you need. I own one and it give you in-depth details and reviews for every single hotel and ride in the park. If you want to save money tho I would recommend getting a hotel right off the park because in exchange for maybe 10 minutes a day more of transportation you can easily save hundreds of dollars.
EDIT: I would recommend going in Jan-Feb if you can, it's normally the slowest time. September isn't horrible either.