Personally I prefer the VEA - have used it every time and never had a problem with it. The kids like the big red 'mickey' bus and I have never taken any longer than 45 minutes to get to Disney - last year did it in 35 minutes! There are shuttles to the VEA from all the terminals or if you arrive at terminal 2 it is just outside the door.
Others on this site recommend a private transfer with E-Z shuttle - no doubt someone will fill you in on that and then others use the train - though a friend of ours waited nearly an hour after a long walk for a train - but again I am sure lots of others can advise you further on that option!
Best of luck with whatever mode of transport you go for and have a brilliant time!