We used ME for our trip last month and it was wonderful...
Our flight arrived at 11:15 p.m. and quickly boarded making only one stop at Pop Century before heading to BWI. That was the good part.
HOWEVER...
We had tagged our luggage to be picked up by Disney and it did not arrive at the resort until 2:00 a.m. We were already asleep by then so we did not get our baggage until the next morning. One DD and I had packed things in our carry ons (like PJs, toothbrushes, etc.) but other DD had not done so. Therefore she had to sleep in her skivvies and was none to happy about that. That was her problem, not Disney's, however. They are up front about the length of time it takes to get the luggage picked up and delivered to the resorts.
If we were to use ME again, I think I would leave one suitcase without the ME tag and we would claim it ourselves upon arrival at MCO. That way Disney could do the bulk of the work but we would have essentials for the first 12 hours or so.