I also use the SP01 Shadow for IDPA and USPSA, both iron and optics (changeable slides).
The feel and natural pointability off the gun are spot-on for me, very reminiscent of the Browning Hi-Power which I find to be the perfect grip. Nice solid weight being all steel for comfortable and steady shooting, low muzzle flip, but not cumbersome and too heavy...if anything its proportions are rather svelte. With tuning the double-action is light and smooth, and most importantly with the 'old style' 85C trigger the single-action break isn't so far back like with other DA/SA guns. And I can also use it as ESP in IDPA starting cocked-n'-locked.
On top of all that, it feels like it's built like a tank so it will take a beating and is easy to maintain. Just the perfect competition 9mm for me, and it fits me better than a Shadow 2. Only niggle is that it's a bit heavy in the holster when running around during multi-gun.