I haven't shot the new Cam 1/2 or Spiral cam yet, but I have drawn both of them. I can tell you flat out that I'm not good enough to shoot the Spiral cam. Single cams are bad enough about reminding you to keep back tension while aiming. Spiral cams are insane! There is no valley, WHATSOEVER, between letoff and stops. I can just imagine what shooting it is like. You'd have to be right on top of it every time you drew the bow.

Unless you're a highly dedicated and very skilled shooter, I'd recommend the Cam 1/2 instead of the Spiral cam.