Well, it points and shoots like a SIG. If you like the way P229s and P226s shoot, you will probably like this. The biggest difference from those of course is the striker instead of the hammer, and the P320 has the crispest release and reset of any striker I have tried. It reminds me of their classic P series in single action mode, just a bit higher pull weight.
I never put much stock in the whole "high bore axis" argument. I worry much more about a comfortable grip and natural point of aim, and this does it for me in a way that Glocks never did. Here is another way to look at it. My splits might be a 10th of a second slower, but if I come back on target naturally and all of my shots are true, then I don't think I have given up anything in a real world gunfight. So, while this may not be the best gun for an elite level Steel Challenge or USPSA competitor, it is a great defensive gun.
I have never had it in 9mm, but I originally bought it as a .40 S&W compact and did find the recoil a bit harsh in compared to my all metal SIGs. In .357 SIG full size, it is a dream to shoot, even with 125 gr. Gold Dots clocked at 1,390 fps muzzle velocity. I imagine it would be a kitten in 9mm.
I would post a picture of mine, but Microsoft screwed up the image hosting function of OneDrive.