We used it in August, and will be using it again in Feb.
There was a little wait for our bus, but not that long. I think they typically show a Disney video on the ride over (ours didn't, but the driver was great and talked about Disney)
We had prepared to not get our luggage right away, so we had packed a park bag. We went straight to the parks, and when we finally made it back to our hotel, all of out bags were waiting.
Our return trip, my IL's for some reason rushed us onto an earlier bus then the one we were scheduled for, so we were at the airport like 3 hours early. If we would have gotten on the right bus, we would have been like 2 hours early.
Every thing was smooth, and we will use them again.