Feels less intense than Space Mountain to me, but that's probably because it's smooth and not jerky. The biggest issue with motion sickness seems to be people moving while watching the screens. I don't have those issues, so it wasn't a problem for me. If motion simulators bother you, then this probably would. It could bother some people that don't usually have motion simulator issues as well. I know this sounds counterintuitive, but I find if I ride Forbidden Journey first thing in the morning without having eaten anything, I will feel nauseous. Usually not when I have eaten something, even something small. So maybe try eating a little something before riding, assuming you don't have motion simulator issues.