No updates on the Kurve, but it looks like Power Surge is packed up and gone from the park. The Rock-O-Plane base is now in it's spot:
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My sister rode that with her kid and he kept getting his head banged on the railing thing. They were not fans. Maybe if you're the right height and not a kid? I was scared to ride it due to fear of getting sick.
I watched some videos of these rides and it looks really fun (if you can tolerate it), except maybe if you're tall. Not a lot of headroom it doesn't look like? I'm 6', would I have an issue? The rider controlled brake is such an awesome feature.