I have always been leery of it - thinking that it would be a good place for it to hang up and jerk the pistol out of my holster or hand. That spur hole and smooth grips are two things that turn me off when examining a handgun. Sweaty hands and smooth grips are a no-no.
I agree, although there are several ways around those problems. The top of the round hammers on the CZs are serrated for grip, just like a regular hammer. And the aluminum grips have 70-grit skateboard tape inserts where most of the palm and fingers grip the weapon.
My polished stainless steel CZ75 is so slippery I had to put wrap-around rubber grips on it just so I could get enough grip to rack the slide. Too slippery for serious defensive work, but it looks good when I take it plinking.
I've also shot handguns with composite grips like G10, and the "grip" was so coarse it felt like I was running a belt sander across the palm of my hand. YMMV, but there's a wide of assortment of better or worse choices for every preference.