For the money the Sigma is a great gun, dont buy into all teh gun snob BS out there. I have had zero problems with my Sigma. Most people bash them just to bash them. I bought a few Hi-points just because everyone was bashing them, they have all shot very well once you break them in.
Honestly id say most people online who bash everything that isnt an AR, Glock, or XD have zero experience with teh firearm they are bashing if they even own a firearm.
Sure i get some looks when I pull out my Sigma and i really get some looks when I pull out my Hi-point but after i knock the center out most come over to ask if they could fire off a mag.
I have seen all brands of guns fail be it Sigs, double star, hell i have seen a $2500 custom Dan Weson that was reduced to a single shot all guns will see some FTFs.
would i trust my life with my Sigma yes would i caryy it no only because i have other firearms that better fit that role