I'm perfectly fine on RnR, ToT and Star Tours. But Body Wars makes me queasy. Mission Space definitely made me quesy. Yes, it is smoother than Body Wars, but the space you're in is so much smaller, which for people like me adds to our motion sickness. In comparison, the capsule you're in is way smaller than say the ride vehicle for Back to the Future at Universal - only four people to a capsule and the control panel comes down right in front of you.