We had an unusual experience with Magical Express (but good unusual).
We did not have the luggage tags on our bags (as they didn't arrive in time before we left, booked late). We arrived mid morning, so we went to claim the bags ourselves and take them on the Magical Express Bus. Much to our joy

(NOT), our luggage did not arrive. So we headed to the lost baggage counter and were told our bags did not make the flight and would be on the next flight later in the day (around 1 or 2pm). Fabulous!

, we were already delayed a day in arriving at WDW (due to flight cancellations and being rerouted halfway around the USA to get to Orlando due to national flight cancellations). So we were given a lost baggage claim number and told the bags would be delivered to us, whenever! Great! So off we went, down to Magical Express and checked in there. Told them the problem with the bags, gave them a description of the bags also, but told them they did not have the disney express tags on them. They were SO helpful and said not to worry, they would get the bags off the next flight and bring them to the hotel. So off we went and hopped on the bus to AKL.
So I phoned later in the afternoon (once I knew the next flight had arrived) to make sure the bags had been found, and sure enough, disney had found the bags and they were on their way to the hotel. They arrived late in the afternoon (around 4 or 5pm), which I thought was pretty good, considering they didnt have luggage tags, so had to be found and delivered.
So we had a good experience with Magical Express, yes the bags took a while to be delivered but that was the airlines fault. Once the bags were found, they didn't take very long at all to be delivered.
Just wanted to share my experience.