I had a .40 cal. Zastava that looked and shot just like a Sig. It had a great grip and feel, and performed in an excellent manner in all aspects... except for the metal in the frame. I tried slipping a light onto the tac rail, and it sheared off the corners of the rail... so I tested the metal a bit further, and found that the frame was very soft metal all over.
Mechanically, the gun functioned flawlessly, but "wear wise", it was such soft metal in the frame, that I got rid of it. It was "wicked accurate", and felt good when I shot it, but every time the frame hit anything metal, it dinged up and lost it's anodizing.
I would hope that Zastava has fixed that, but since they're "import guns", I doubt if they care if they sent junk out. With a solid frame, they would certainly be great.
I also owned a model 88 9MM for a short while. I shot the gun for about 2 weeks, and never could get it to cycle properly, so I spent about 40 hours honing the slide and rail fit-up until it ran smoothly. It still wouldn't cycle properly, so I traded it off.
I might be tempted to try another .40 cal again, but the M88 was junk from the get go, and I was never satisfied with how it shot.
WT