Simpsons gave me a bit of mild nausea a few years back. But since they made the projections with a sharper image, changing lighting or whatever they did, two or three years ago, I no longer get any nausea or mild motion sickness. It works really well for me now. And I'm on the quite a bit older side of the equation ( I get motion sickness on spinning flat rides & coasters like DC) (And I used to get mild nausea on FJ until they sharpened the projections and made minor changes to the motion.. Now, I get no nausea on FJ at all. )