Just got back and used ME for our June trip and loved it.
It went just like they said it would. We got to MCO at 11pm and were so tired we asked them to claim our bags for us and just deliver them in the morning. We had packed one of our carryons with the items we would need for one night anyway (just incase luggage was lost or an unforseen layover). I called Luggage services the next morning at 7am and they had the bags to our room in 20 minutes (stayed at Pop).
For our return trip, the papers were on the door the day before we left. They told us when to be at the bus stop, about three hours before our flight left. Dear husband did not think we would need the three hours

and so he called to find out how often the buses leave. It is about every 20-30 minutes. So he said we could wait for a later one. Well, after I threw a fit, we finally headed for the stop about 5 minutes before we were told to be there. After getting the luggage from the bell hop (at CBR) the bus we were told to be ready for had left. No problem says dear husband. About 20 minutes later, the next bus comes and we load up for that one. Get to MCO and then wait in line for security (DH wishes we had that extra 20 minutes now) Got the bags checked, then walked forever to the other side of the world to go thru the next round of security. Made it to the gate with 15 minutes to spare. Just too close for my taste.
But....if we had done it like they told us to, there would not have been a problem, but then I could not have told my husband, "

I told you so

"
In my opinion, if you can use ME, do it. It is a great free service.