I have done the guided fishing excursion twice now. Both times were well worth the money. It is a two hour guided fishing trip. The first trip, we fished at the ferry boat landing at the Magic Kingdom. Using live bait, the guide and I caught approximately 20 bass in a 45 minute period. On the second trip, we tied up to the dock at the Poly, and had the same results. The second hour of each trip was spent using artificials on the Bay Lake side, but got to see some areas that are not accessable otherwise.
If you are an avid fisherman or just a novice, I highly recomend this excursion.