I have one. Lots of ammo, soft shooting, extremely accurate, can be carried cocked and locked. I love it. I carry mine when I'm hiking in a Safariland holster. The older ones had some issues with the magazines. I replaced the mag springs, and all was well. It serves as my bed side gun now with a CT railmaster laser on it.
In my opinion, the FNP-45, FNX-9, and 40 are the best, highest quality polymer guns on the market. I'm sure the fns's are good too, but I prefer hammer fired guns. JMO
The only thing I don't like about it is that the magazine release is enlarged for ease of use. My trigger finger hits it after I pull the trigger. It get's a bit annoying.
It is a large blocky gun, so if you have smaller hands, it may not work for you. It is not the same size frame as the FNX 9 or 40. It's larger. It has a 4.5" bbl as well. The backstraps are interchangeable.