I did the segway tour this past July. It was very awesome. We went all around the World Showcase...it was amazing. The only thing with me though, I kept getting caught in the speed limiter thing. The segways are only allowed to go 5 mph and apparently I kept trying to making it go faster and so the thing would slow down and push back on me forcing it to stay under 5 mph. heh. I absolutely loved it.
They start you off in a class so by the time you go out into the park, you're pretty confident about riding them. Before you know it, you're spinning in place, flying in reverse, and whipping around your family and/or friends lol. It's SOO much fun.
During the class, the guy (very nice guy btw lol) told us to go forward, turn around a cone, stop, and face the other direction. I got the cone...but I didn't stop...haha. I just kept going and going. By the time I reached the next line of people in the class...I finally stopped and attempted to get back into position. That was of course, my first time on the segway heh.
I highly recommend it to anyone within the age limit.