After spending two months working at the survival pool the (the OLD one), i had more rides in that thing than I can count. No doubt, I hated it at first, but i got used to it. So when I went through for API (and subsequent trips to swim phys) it no longer bothered me.
I think that kind of desensitization is a good thing. People ought to ride that thing until they think it's no big deal - one less thing to think about as your helo is rolling upside down and going under. A week of doing that would be miserable, but it'd pay off that one time you really need it.