I've owned one for almost 2 years, it's been an excellent and 100% reliable pistol for me. Mine has the night sights too and I bought it used with 8 mags total and 2 holsters for $500 on gb after about 6 months of waiting for a good deal.
There's not a single bad thing I can say about it besides there's no aftermarket trigger, and accessory support isn't as great as M&P or Glock, although better than it's been in past years. The trigger isn't really in need of an upgrade, but the option would be nice. I like the looks of it compared to Glock, shooting it feels better than both Glock and M&P (owned both), and compared to the M&P, FNS fit and finish is much better imho. *I'm not trying to start a thread about which is a better gun, these are just my opinions and preferences.