I have one, actually traded my first generation Saint in 5.56 for it, and I have no regrets.
Only issue I had was with the lubrication of the lowers guts. Thing was so dry the trigger didn't reset, unless you put your fingertip behind the trigger and pushed it forward to reset it.
But some high temp moly-graphite grease fixed it.
The gun runs, and RUNS. Stretching it to 50 yards, center mass chest hits are the norm, and running a Meprolite M21 makes it easier than easy to get good positive hits.
Magazines are plentiful, except of the 25 round modified Uzi type, but I'm working on that too. However, 32 and 20 round models abound.
Only changes I made to the stock rifle was an A1 pistol grip, fixed sights, and a LaRue RAT stock. Only thing left is a light, but that'll get remedied in the new year.
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