No problem at all--its not fast, no sudden drops, its a beautiful ride.
If you get scared, you can look around (we were in the 2nd row) and see other people's feet or the line of seats on either side of you to remind you that its just a ride.
Also--as part of the simulation, they do blow a little wind on you to make you feel like you are really parasailing and that would help I'm sure if you started to feel woozy.
Its an amazing ride and if at all possible don't let your fear hold you back. I figured, hey, I'll never actually do this in real life. Its my chance to be "brave" with no risk involved.