I never had a chance to ride it, but just a few minutes of a YouTube video was enough for me. Maybe it was better when the park first opened but wow.. I don't know how anyone could stand this for 30+ minutes. Do they allow you to bail mid-ride?
A large part is the scale and spectacle of it. We often say you can't judge from a YouTube video - but in the case of Energy it's really true. The vehicle movements are very impressively done.
It plays into the "epcot has a lot of films" cliche and then goes "Ha! Fooled ya!" when the theater breaks apart and starts moving.