Well I certainly do not have a ton of experience with Disney World trips, which it seems a lot of people posting do, but I've taken a couple of trips and I've had two different experiences.
When I was a kid we stayed off property and had the shuttle system, which I'm sure I don't need to tell you folks was not the best plan. Needless to say, when I went last year that was out of the question. My girlfriend and I stayed on property and just used the bus system, and I was very glad for it. It's convenient, and since you don't have to go see the launch anymore it's probably not a bad idea just to use the buses. Of course, if you want to go to other parks and to the grocery store then you know which option to choose. I don't think the wait for the buses was too bad, and it was nice not to worry about parking and sit in an air-conditioned bus after a long day at one of the parks (especially with that ridiculous humidity. Not too much of that in California).