Welcome to the forum. The Sigmas have been cussed and discussed extensively here. Try searching the topic. In general, long crunchy trigger pull, fairly reliable, decent pistol for the price. Had one myself but have since sold it. If you can hold out for a Glock. I like the G19 myself. I sold my Sigma for $300.00 at the last 1500.
Try it, a $10 try might help you make the best decision ever when you get that Glock 19, by the way this site is cast with demons, dont listen to them when they start calling. "Don't by clocks, get XD"; it's like the sirens!