We were there with a bunch of our family a few years ago. FIL, BIL, our nephew, DH and I went to ride the less intense Mission Space. That was enough for DH and I to decide that attraction was not for us.
However, FIL, BIL and DN all thought they could handle the more intense version. Well, they were the ones who were ill the rest of the day. I think DN might have even been sick. We tried to warn them, but they didn't want to listen...
So, yes, I will never ride Mission Space again. I also won't do ToT because I hate the dropping feeling and just don't see the point in Stitch's Great Escape.