We rode Mission Space last week and I can't tell you how disappointed I was. After reading here how unique it was, how exciting it was, and how *sick* some folks got, I was a tad nervous entering the ride. I found the preshow very fun, the capsule to be much larger than described, and the ride....well, dull. It was nothing more than a simulator ride. Yeah, the g force was cool, but it was pretty short lived. I didn't notice a feeling of weightlessness and once "liftoff" was over, it was A LOT like Star Tours.
So, even though I'm in the minority, count me as someone who didn't get sick at all on this ride (and saw/spoke to no one else who did) and found it not worth all the excitement.