When we went to WDW last August, I had heard about the bounceback offers. I posted on the site "why would I book bounceback for this year if I wasn't going to save any money for doing it?" There were 2 responses:
One was room/resort preference would be guarenteed, or as guarenteed as it gets with WDW.
And two- booking my ADRs at the 180 d mark. As soon as I calculated that I could book my ADRS in February I knew that I had to book bounceback. I am looking forward to being able to book without the chaos and stress I went through last year!