I've got an FN57 and love it. I can varmint-shoot out farther than I can see with it (and the varmint always seems to "mostly" disapear after it's been hit, lol)
It IS, in fact, my "night stand gun" - if I hear an intruder coming up the stairs in the middle of the night, that person will be "intruded upon" by 20 VERY QUICKLY fired shots to their center mass.
I HAVE occasionally carried this piece - it DOES fit in most of my full size 1911 holsters.
No, it's NOT for everyone - but it's for me. I like it - it's yet another "tool in the toolbox" so to speak. It's NOT a "cheap tupperware" piece, it's an authorized NATO weapon and another quality firearm from FNH. It's a handgun that protects Kings, Queens, Presidents, and Heads of State around the world - it's combat proven as well.
For those who compare it to KelTec's PMR-30, Keltec is still working the bugs out of their PMR and maybe when the PMR has been around as long as the FN57, Keltec's PMR will match the quality of the FN57 - KelTec's a good company and their customer service is awesome which is helping them QUICKLY make the requisite changes to get the PMR "right" - but it's still "not quite there" yet.....
The gun is so easy to operate that I got one for my 97 year old uncle for home defense - even with arthritis and at age 97, he can load it, rack it, chamber it - and get a few shots off.
He liked it so much that we got one for his brother, my other uncle who suffers from Parkinsons (only has tremors, thank god) - but he too can safely operate and use the gun at age 85.
It's a keeper and a gun I haven't ever regretted spending the money on....