One of the most boring, irritating things I've ever been through. It's a six hour trip both ways featuring an extraordinarily boring view of desert scrub. I don't think we saw a single animal on the 60-mile trip. The staff is extremely annoying and rude, and will pester you the entire trip with insufferable commentary and horrid, tasteless jokes that perhaps only 5-and-unders would find enjoyable. It's basically an excuse for adults to get drunk for several hours, and I heard the people across from us comment on how boring and slow the trip was multiple times.
Don't fall for this hokey, overpriced tourist trap, and just drive to the Grand Canyon. You'll have a much better time.