I picked up a 9VE version of S&W's Sigma line last year. The reasons were;
1) Wanted a 9 since Winchester white box ammo was cheap
2) Liked the way it fit the hand
3) Price
4) Something for my sister to shoot, other than a .22
What I didn't like was the trigger pull and the safety.
Put several boxes of ammo through it without any problems.
Thinking that the trigger could be worked on to achieve a somewhat lesser pull weight, I sent it off to a 'smith to have it worked on. He stated that he had lots of success smoothing out the triggers on Sigmas with exactly the ammo that I planned on using. Alarm bells should have went off on that statement. The only smart thing I did was ask for all the original parts to be returned. It came back with a somewhat lighter pull.
Next trip to the range and it went bang, bang, click, bang, click, click.
Pulled the slide off and stripped it. Found that the striker spring was clipped to reduce the pull weight. Put the original spring back in and haven't had a problem since. Trigger pull weight was back to factory original.