I own two C-9s and a 45. All were purchased used from a local pawn shop so I can't say how many rounds were run through them before I got them.
The 45 has never had a misfire of any kind through about 1000 rounds.
One of the C-9s has trouble with one of the four mags I have. The other, as far as I can recall, has never had any misfeeds.
I actually like the sights. I like the gun very much and will gladly let anyone shoot it if they want to try it. I have never really shot for accuracy, more like pie plate accuracy at 15 yards, but it feels good in the hand. It is heavy and ugly and I wouldn't want it on my hip.