Great deal!
We stayed there in the past year on a $99 teacher rate and that was a good deal.
Just beware of very high prices in all of their on-site restaurants. DH and I just ate off-site. Also, there will be an extra parking fee and extra resort fee, but considering the rate you got, it's still a very good deal.
It's a beautiful resort. If you're going without kids, check out the South Beach pool. It's adults only and is a salt water pool. It's very nice.