Well, I've been around this many times before with many different people.
Some people find it rough, others don't. A friend of mine rode SP for the first time today (and the last), and liked it. He said it was a little jerky, but not horrible. Then, on the other hand, I know people that have been on it, and simply will not do it again. To each his own.
(Earlier this season [very early, in fact, I think it was mid-May], I did have a bad ride. I didn't have a headache, but it hurt my neck a little bit. Other than that, it's treated me pretty good.)
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How dare you vanquish the Steel Phantom without his consent? Fear the Phantom's Revenge.