Has anyone rented DVC points before? How does it work? What has been your experience?

I've been looking at the DVC rental sites and it looks like we could get a MK view at BLT for less than half the cost of a room at rack rate at CR. It looks like a nicer room too. Does that sound right? If we were to do this would it be just like a normal reservation? What, if any, are the differences?

Thanks for the help.