I had my trigger finger pinched with the square guards, the clearance increases as the trigger goes back, and as the gun kicks up it pinches. Took me a long time to figure out what was making my finger hurt.
I generally like the standard Blackhawk or Vaquero grip frame, but have experimented with modifying a SBH grip frame. I took some FA grip panels and traced them, welded up the SBH grip frame where it needed it to grind it to the FA contour, and I had the square guard filled in and ground it down round. Feels pretty goood, but I've never put it on a gun yet.
Never could warm up to the Bisley grip frames, they just feel awkward to me.
Are the SBH hunters all stainless? I prefer blued guns.