Simpsons at Universal almost did my husband in for the rest of the day, many of the other Universal simulators made him ill but that one was terrible. He can only ride Star Tours once and is a bit ill after, he has only done MS Green and is OK, FOP gave him zero issues, we have ridden about 5 times and never once has he mentioned getting even a little sick. I don't get motion sick at all but I don't think FOP is similar to Simpsons at all, it is so much more immersive and the motion timed with the screen so well, which is not the case at all with the Simpsons ride.