I've had one for about 6 years. When I started looking for a CC gun, it was hands down the best fit for me within the budget constraints I had. I was prepared to spend a little more than the SR9c was going for. The trigger was the deal maker for me. I really like the ergonomics, the trigger and the ability to choose between 10 and 17 round magazines. The mag disconnect and the LCI are non issues for me either way. I WILL NOT carry a striker fired pistol without a manual safety.
I have about 4,000 to 5,000 rounds through it and it developed an occasional failure to reset. I sent it back to Ruger and they replaced most of the innards, including the barrel. Turn around time was about 2 weeks and it now performs flawlessly. Prior to this it was extremely reliable and would eat any ammo I threw at it. From what I could discern from the forum here and elsewhere the failure to reset was a known issue around the time I bought mine. I assume that Ruger made some changes that dealt with it, as it does not seem a common thing these days.
I have no regrets whatsoever about the purchase, despite having to send it back for repair. I would have to say that if I were be looking today, I would look hard at the S&W Shield in .45. The main reason for that is I am becoming enamored of .45 ACP after purchasing a 1911 last year. For a small, light gun the Shield is amazingly accurate and reduces felt recall for a hefty caliber.
Having said all this, I still believe that 9mm is a good carry caliber, and the SR9c is a good 9mm carry gun.