We were in WDW 8/15-8/21 and used ME. We had NO PROBLEMS at all. I have read of some accounts of trouble, but for us, things went smoothly. I guess the biggest draw back would be that your luggage doesn't arrive for 1-4 hours or so after you do. We just packed what we would need right away in our carry on and when we went to our room 2 hours after we checked in, it was all there. When we left, they stored our bags until our pick up time and loaded it for us when the bus arrived. We only had a couple stops after ours and each stop is only 5 min or so. I called the night before we were leaving to be sure things were all set. You can call MS to "get onboard".