I've had a S&W Sigma .40 for many years now (13 or 14), and it's a great gun. Actually, it was my first handgun that I ever bought, and I got it at a gun show in UT where I was living at the time. I bought it used, and I've shot hundreds (or possibly thousands) of rounds through it without ever having a problem of any kind. My understanding is that S&W essentially copied the Glock firing mechanism and safety, and eventually paid them something like $4 million for doing so. Regardless, it's an inexpensive, dependable firearm that I have no plans to get rid of.