Using DME is great for the free ride, but I wouldn't trust my luggage with them for my life.
I know a dozen people are about to type "It worked great fine for me (send)", but I have seen too many issues with it for me to be personally comfortable with it.
Twice now I have walked into a room and found luggage sitting in the room from the previous guests that DME "forgot" to pick up. Both times I have had to wait for them to pick it up (I wasn't about to leave my luggage and some strangers luggage in the same room, lest they mess up and accidentally send mine away), and both times I could have had a real great criminal time with full access to all these people's personal belongings. Not to mention, glad I wasn't these poor people who's planes had already left without their luggage.
Second, I have known several people who have had items lost on DME and none have gotten their stuff back. Why? Because when a bag is lost, DME says "oh must be the airline", the airline says, "Oh, must be DME!" and there is no one to hold accountable.
I'm sure the larger percentage of people use it just fine every day, and I'm sure many people get their stuff just fine, but MY stuff is just too valuable to me on a trip to risk it. Picking up bags at MCO is criminally easy, and I feel *SO* much safer getting themselves when I use DME. In addition, I *REALLY* like being able to check in, get settled, change my clothes, etc. before I run out to the parks, instead of spending my first day in the parks thinking, "Gee, I wonder if my bags will arrive?"
Although I prefer driving now, I think DME is a great bus service. However, I wouldn't trust them with my bags for anything - they say they scan it every ten seconds, it's so safe, etc. - but a chain is only as strong as it's weakest link, and there are just too many links to keep track of for my taste. The less hands on my stuff until I get it, the less chance of it to disapear. That simple for me.
AEfx