You can add me to the "happy camper" corral, too. I bought my sw9ve right after Christmas and didn't get to try it out at the range until last week. During that time, I read and watched everything I could find about the Sigmas. Additionally, even though my trigger was fairly smooth, I did quite a bit of polishing and removed the pigtail spring. Didn't make a lot of difference, but it did make me feel proactive.
My range trip went fairly well, except for about a half dozen light strikes out of 350 rounds. I think I've narrowed that problem down to my gun not liking Academy Monarch 115 FMJs. Only strange thing was that those FTFs cycled just fine through my PF9. The Sigma dented the primers on all of them. All of the problem rounds came from 2 of the boxes and the other boxes cycled fine. I would have worried more about it, except I ran around 120 Gold Dot 115 JHPs that fired flawlessly. As long as my PD rounds cycle well, I'm confident. If the problem continues, I can reinstall the pigtail spring. I did find an error I made that might account for it, though. I had torn down and removed the firing pin assembly while F&Bing. I remember cleaning it up, but must have put it back dry. I wiped a little oil on the plastic FP sleeve and hope that helps the FP travel smoother.
I'd like to say this is one of the most enjoyable guns I've ever shot. I believe I could run a thousand rounds through it in an afternoon with little or no fatigue. Additionally, I shot better with it than I have with any other weapon. 4-5" groups at 21' were the norm and 6" steel disks at 50 to 60' weren't even a challenge. I had several times where I loaded both mags and rang the bell on all 34 rounds. As I said, this is a comfortable gun to shoot. I let about a half dozen other shooters try it out and everyone of them said they really liked it. A couple who were testing guns for purchase said the Sigma made up their minds. All of them thought it was a sweet shooter.
It's a shame it has such a poor reputation, though. When I was looking at mine, the salesperson at Academy Sports tried his best to talk me out of it. So much so that I went home to do some more research before I went back and bought it. To be perfectly honest, it felt so good in my hand that I was probably gonna buy it anyway and I'm sure glad I stood my ground and went with my initial impressions. About the only valid complaint I've seen about the gun is the trigger pull and it seems to suit me just fine. For $250-270, after rebate, it's one of the better bargains I've seen lately. I know I'm happy with my purchase.
