In the past, I would have said DISNEY BUSSES!!!!! They have more direct service, and you can sit back and relax on your way to and from the parks. HOWEVER, after this last trip, I'm not so sure. The beginning of Thanksgiving week, the AKL bus service was TERRIBLE!!! Average wait was 30 minutes, I was quite frustrated. I kept tellling Ted, "Next time we'll have a car!" The bus drivers would wait and wait until there were so many people on the bus that there was not longer any room for the people standing to hold on. Once, a bus driver even got MOOOO'd at because he was treating us all like cattle.
Later in the week when the crowds picked up, so did the busses. Average wait was around 5-10 minutes. Here's a true test. I was at AKL finishing up from my afternoon date with the pool and lounge chairs. Ted was out in the parks with his friend Steve who lives in Orlando. I spoke with them, they were at MGM, just getting to RNR with walk-on passes. They promised to head straight to Epcot to get good seats for the 4pm Tapestry of Dreams. They had car transportation, I had the busses.
I took a shower, changed, and did my hair. I ambled on out to the bus stop. I waited and waited... A bus showed up and literally broke down under the gate to AKL. Someone said it was on fire. It was completely blocking hte entrance, and many busses arrived, dropped off the passengers out in the street (they had to walk the rest of the way) and then the busses left!! FINALLY, it was moved out of the way. Another several minutes later, an EPCOT bus came. I was worried that I wasn't going to find the guys in time for the parade! I got to Epcot and started booking it toward WS. I called them on the cell, and they weren't even at EPCOT yet!!! I found okay seats for the parade in China, and they arrived just as the parade was starting. Car=0 Bus =1 Busses win that time!!
Either way has its benefits, I think it depends on whether or not you'll be traveling off-property for shopping, dining or other parks. If not, I say go with the busses.
Holly