My DH and I did the Segway tour in Epcot about 3 yrs ago. LOVED IT! Instructions and video inside Innoventions, along with some practice around cones, etc. Then we moved outside and over into China (I think) for some fun riding. Took pictures of ourselves and enjoyed being out early. As we were riding back to Innoventions, the park had just opened and folks walking by us watching us - that was neat.
I did the Aqua Seas tour by myself about 2 yrs ago. Again, video inside a conference room, then into our wetsuits to head out to the tank. Practice with the air tank and snorkel, then we could go at our leisure around the tank. My family was watching from inside The Seas viewing area. I thoroughly enjoyed it, but had some vertigo or something afterwards - took me about 1-2 hrs to get over my dizziness and nausea. This may have been caused by my not being able to wear my glasses with the goggles, and I had no contacts, so my already poor vision combined with looking thru water for 30 minutes straight might have been the cause - I don't really know. I'd be willing to try the tour again if I took some contacts.
We are scheduled for the KTTK and Ft. Wilderness tours this coming May, so I expect they will be as wonderful as our previous two.
Have fun!
