I own at the BCV and book at my 11 month period and have no problems, obviously. I've tried and tried at the 7 month period (wait list) to go to the BWV and have never succeded. This is first week of December I'm talking.
Buy where you want to stay. Love the location of the BCV, rooms are fine, no complaints really, except for the stinking 'frontage road' and the noise from it. To lots, not an issue, to me it's becoming one. That's why I keep trying to get over the the BWV to stay. As WDW sells more and more and builds more and more and takes away more and more of trade options, it's going to get more and more harder to get what you want, that being said, buy where you want to stay. Couldn't imagine having to ride the bus to Epcot/World Showcase and/or MGM (or whatever they call it now). Now, that's spoiled!