I have had a one for about 12 years. It is one of the most accurate pistols I have ever owned. It is also the most unreliable. The gun does not like to feed ammo correctly. I also know antoerh person, who had the same problem with his.
I have sold a BUNCH of Sigmas. Without doubt the most traded gun on their (S%W's) inventory. Absolute garbage from the trigger (which they even supposedly improved), poor fit and finish, to the horrible relaiblity. Save your pennies and get the M&P or a Springfield XDM, both worlds better pistols.
Big Al's "Take-Em" Style Silhouette Decoys Pro-Staff.
I have a sigma 9mm and actually like it.. The trigger pull is dreadful but for me it isnt an issue. Points well and hasnt jammed yet. I know the early models were garbage when it came to reliability but I'm happy with mine..