In my "old age" (I'm 25) I've started to get sick on Body Wars and Star Tours, but I think its all the stomach jostling. I didn't get sick on Mission: Space. It feels just like the Gravitron (fair ride) if you've ever ridden it. My DH did get sick on the ride. He almost through up after getting off. He never has problems. I say try it once to say you did it, and then if you get sick, you don't have to do it again.