My daughter and her friend just did this 2 weeks ago from the Contemporary. It's run by Sammy Duvall Water Sports, and they offered an AP discount. (I think it was roughly $139 for a tandem parasail with my discount.)
This was something she's always wanted to try, and I'm glad she finally did. They really enjoyed it, and got a lot of great pictures from up there. She said the view is amazing. My 4-year-old and I rode in the boat with them and got some great pictures from the boat.
I think it was well worth the money!