I have only had my FNS-9 to the range a few times and a few hundred rounds and so far have fed it only budget ammo of 115 grain WW White Box & commercial reloads. It's been flawless to this point.
Before I bought it my only concern was the trigger, since I had read some bad reviews on gritty and stiff triggers on the FNS. I ordered mine through GunBroker and got lucky. It is the best, smoothest striker fired trigger I have ever owned. My 2012 production Glock 19s have around a thousand rounds each and a gazillion dry fires through them and they are not near as good as this FNS.
Before I bought it my only concern was the trigger, since I had read some bad reviews on gritty and stiff triggers on the FNS. I ordered mine through GunBroker and got lucky. It is the best, smoothest striker fired trigger I have ever owned. My 2012 production Glock 19s have around a thousand rounds each and a gazillion dry fires through them and they are not near as good as this FNS.