DH did this last month. He really enjoyed it and he was glad he got to do it(I gave it to him as a birthday gift).
He got 1 hour of inside training and a little under an hour of going through all the countries in World Showcase. The reason the tour was cut a few minutes short was because it started to rain so they just went straight through the last few countries, without really riding around them. They were also able to take a photo break right with SSE in the background.
Because of the rain(it rained off and on all morning from a light mist to pretty good showers) they almost werent able to go outside at all but the tour guides sort of checked out the group to see if they would goof off or not and they made them promise to go slow. Had they not been able to go outside they would have refunded half the money.