I'm at WDW with our Bob Revolution Dualie right now! I am SO glad we ignored the advice to rent a smaller stroller. We have had ZERO problems on the bus which is what everyone said. I'm glad we have ours and not one we don't know how to use! DH can fold it in seconds and although it is heavy he sets it on the floor on the bus, so no big deal. We can navigate like nobody's business to zip through the crowds.
I am SO glad we have our stroller!
Also, there are a LOT of BOBs here. Some people even have rented BOBs. Not sure which company that is. The BOB is definitely not the biggest stroller around. The widest I've seen are the two umbrella strollers that are connected. Those are a couple inches wider and seem very hard to maneuver.