Of the three stand-ups I’ve been fortunate enough to ride, KC was by far the most comfortable. Mantis’ layout was a better layout but it would beat me to death the second half after the brake run. Carowinds Vortex is a short ride, but it’s got the same beat your head to death that Mantis had. KC was almost glass smooth compared to them two. What a great ride it was. Personally it, by far, is my most missed defunct coaster.