Anyone done it? I was thinking about taking it the next time I go to WDW w/ my wife. Any thoughts on it? I always feel like I don't see enough of the plants when I'm on the boat. I thought the walking tour might allow me a little more time, and a different type of guide (not to say the boat ones are bad... quite the opposite - they're great - but there's a lot of people on the boat, and only so much time on the ride).