I've had 3 of them.
2 were great, one had issues.
My first was an SA58 Tactical in 2017. It ran great and I never had any issues. I wanted a more classic looking gun, though, so I sold the Tactical and got a SA58 Classic with 21" barrel. That gun had a lot of issues. Mags would stick in the receiver, it never got through a whole mag without jamming, etc. My friend really wanted another FAL and he bought the Classic from me despite me telling him about the issues. We shot on his property a little over a year ago and he brought it out and it was still jamming.
My biggest gripe with them has always been the lack of a chrome lined or nitride barrel which they fixed starting last Summer. Now all of their standard SA58 guns ship with chromed barrels which is a nice addition. Should bump the barrel life from 7-10k rounds up to 20k at least.
My current SA58 Carbine with chrome lined barrel has been great. Fit and finish are good. Mags seat well, and I had the gas system all set after about 5 rounds and it was reliably feeding and ejecting everything.