JHC, Volgrad and myself have been trading messages about these.
I have about 250 rounds through mine with the following issues:
No malfunctions but the slide feels sluggish.
Trigger pull measures 5.5 lbs on a gauge but feels heavier. You can feel the trigger drag and there are drag marks on the sides of the trigger. I think both of these issues relate to the frame finish which I believe is cerakote rather than SA's usual AK.
Mine also hits low - though not as bad as Volgrad's - it hits just below the dot at 25 with ammo ranging from 115 to 147 grain.
My prior positive experience with my SA MC operator 45 influenced my purchase of the 9mm. I'm rather disappointed for a gun with an MSRP over $1700 and will be requesting an RMA as well.