When we went, we got 25% off with the coupon in the back of the Birnbaum's Disney book. We just asked for the Birnbaum's discount, and they never asked to see the coupon (though we did have it!)
Vero Beach is a beautiful resort. We ate at both Shutters and Sonjas and thought the food was excellent. We also ate at the pool bar, where my little one lived on fruit cups and slushies. Both daughters loved the children's progams, especially the "unbirthday" parties, the pool and metal detecting on the beach (we found no treasure, though). The only disappointment was that we couldn't actually swim at the beach, due to warnings about riptides, sharks, stingrays, and I forget what else. If you are a shell collector, you will find lots of shells on the beach, though.
I hope you have fun!