We own both MVC and Vistana and have booked the Destination Escapes in prior years using our MVC ownership. It is a great benefit, but a little quirky. The availability can be booked up very fast so when its posted, you need to jump on it. Also, you can't book directly on line, you need to call in and get them to book it. The list of availability only comes out every couple of months or so and only shows availability for the next couple of months. But if you can book them, they are very cheap!
With this new abound program, we experimented and converted our KORN ownership to abound points for next year. With those points we were able to book into a normal MVC property on line, but when we called in to try to book a destinations escape, the system wouldn't allow it. The rep we were speaking to didn't know why and so contacted her supervisor, who told her to contact another supervisor, etc. Maybe just a bug in the system. After a long time on hold, we ended up get disconnected so we never got our booking.