We just (and I do mean just) got back from Disney, and ME worked wonderfully for getting to the resort, but our ride back to the airport didn't show up this morning.
We were supposed to be picked up at 10:20 from BW...got to the bus pickup area at 10:15. When the bus hadn't arrived by 10:35, I went to the valet and had him call. They said they would send a shuttle to take us directly to the airport. The shuttle arrived at about 10:55, and by that time there were two couples who were scheduled for 10:50 who caught a ride on "our" van since that bus hadn't shown either. I don't think this is typical at all (we took ME once before with no problem), but I think we would've been in danger of missing our flight if I'd just assumed the 10:50 would show and we could take that. As we left, I think the valet was calling to see if there was a major problem and make sure the 11:20 would be there as planned.
Our problem might have been that we were dropped off at BCV when we came in, and even though we got our confirmation letter under our door in our BWV room, perhaps the pickup schedule for the drivers didn't get changed correctly. When we transferred to our BWV room we stopped at the concierge desk and I asked them to call ME to confirm that our pickup was NOT where we were dropped off, and they did that...all this is just to say nothing runs like clockwork all the time, so I think you can trust ME to do a good job, but don't wait too long to follow up if they seem to have missed you. My DH says it was a sign that we should've just stayed a few more days....we were obviously meant to.