We stayed at BCV for the first time in October. The busses to the parks are very efficient and timely. For AK and MK, we only shared with YC. (There are no busses to MGM or Epcot, as you can either walk or take a boat to those). However, the bus to and from Downtown Disney was crazy! When we boarded the DTD bus, it proceeded to Boardwalk & then stopped at Typhoon Lagoon. On the way back, it stopped at TL, then the Swan, the Dolphin, the YC, and then finally the BC. It took 35 minutes from the time we boarded the bus to get to the BC. But, we just went to DD once. If we'd gone again, we would've driven, as we had our car.
Overall, though, we thought the busses were fantastic!