I've had it for about 2 years now. The grip stippling is annoying (more of an industry thing really) and it is way slimmer than a single stack 1911. The recoil is super pleasant. So far I haven't had any jams or magazine issues (I leave mine loaded and use the magazine speedloader it came with).
I haven't handled or shot the PSA Rock or Ruger 5.7. The FN handles great and I had an exco-worker love his about 10 years ago, but the price tag is absurd.
I know people complain about ammo prices, but there was a time where 9mm and 5.56 were just as expensive and everyone flocked to Russian milsurp. Locally I can find a box of 50 FMJ for about $25-30 (online $30-35), $30-35 (online $35 and up) for 50 hollowpoints. I will say that hollowpoints are cheaper than 9mm. I have several other calibers so $30 is fine for me.
I don't handload so I can't really comment on how it is vs straightwalled.
All in all, I'm so glad I got the S&w 5.7 and not the FN. 5.7x28 is a misunderstood round that I hope starts making a surge over 9mm or 30 super carry. I just hope we start seeing compact versions of pistols (I don't mind carrying a full size as all my pistols are).