I don't know an exact count of rounds fired but I'm right around 1500 or so. I dry fire the gun all the time practicing. Snap Caps? What are they? lol. Or I'm testing S&W's assertion that dry firing the gun doesn't hurt anything. If it does, I'll discover a problem.
The only falure I've ever had with it is the slide didn't lock back once on the last round, I have no idea why. Took apart, inspected, and cleaned the mags and now I'll be paying attention to see if it does it again. I usually fire Federal from Walmart but it's seen only factory ammo such as Winchester, Mag Tech, Federal or Remington. I did shoot a couple clips of blazer the other day, never any problems, I can't comment on reloads.
A short while back I was worried that the slide was a little too loose from the frame but my father, who is way more experienced with firearms pointed out that it was as loose the day I bought it as it is now. I guess I just never noticed until I held it side by side to a Ruger. I don't have a slide rattle.
I installed the Apex spring kit and the only thing that changed was reducing the trigger pull from 8 1/2 pounds to 5 1/2 pounds. No problems from that aspect either.
Overall, zero problems that would make me question the gun's reliability.