DS and I will be using ME.
DH and I just got home very late last night, or early this morning depending upon how you look at it.

We used ME and stayed at POR. POR is a beautiful resort, and ME was...well, okay. If you're trying to stick to a budget then I think it's worth the small amount of inconvenience. If you're on an all-out, deluxe trip, then I'd get a towncar. We took only carry-ons, so I can't comment on the luggage handling. We were to our resort within an hour of our plane landing, and the bus stopped at OKW and POFQ before leaving us off at POR. It was a full bus and the loading/unloading process was very efficient, IMO.
Going back to the airport we had to be picked up
3 hours 15 minutes before our flight! That's a LONG time. After POR, the bus went to POFQ, then OKW, then SSR, then the airport terminal B, then terminal A, which was our stop. So, we were first on and last off. Total return trip time was 1 hour 15 minutes. It
felt longer. We had a DME bus on the way to the resort, and a
DCL bus on the return to MCO. The DME bus was much nicer and more comfortable.
Not ME's fault, but our return flight was then delayed from a 4:35 departure to an 8:00 departure and we had a stop in Philly, where they made us circle for almost half an hour before we could land. We were supposed to arrive in Pittsburgh at 8:30 but we didn't get in until 12:15.

I'm just happy the delay was at the end of our trip instead of the beginning.
