I can't speak to the FNP-45 specifically as I have only fondled, er, uhm, held one. I will say that they are a handful.
I do, however, own a FNP-9. This is my most favorite non-1911 handgun. It is reliable, accurate, and a pleasure to shoot. I like the ergonomics, balance, and "pointability." The trigger is crisp in both DA and SA mode. It eats anything I care to feed it and it is more accurate than I am.
The FNP line is, without a doubt, the most overlooked line of quality handguns and are definitely a bargain for what they usually sell for. The only drawback that I know of is that their lack of popularity makes finding a holster a little more difficult. I've been thinking of getting a FNP-40 but I can't quite talk myself into another gun chambered in .40 S&W.
In summary - get it, you wont be sorry.