MA, not too bad. I picked up the smaller model in 9mm (size of the old 380 models but chambered in 9mm) and a friend picked up the full size one.
Both shot well, and the internals were well made. The welds were excellent. The smaller one had an issue with ejecting live rounds. If they are too long (such as the Winchester White box ammo) you could not eject the live rounds as the nose of the bullet would get caught on the chamber. You had to take the gun apart to get the round out...or fire it. I think this could be easily fixed by trimming the ejector rod, but anyway it came that way. Note that it would eject spent cases just fine.
These are really rough guns to shoot. There is a lot of muzzle flip, and the ergonomics are terrible, per the original MAC designs. They are fun though, so for other than defense purposes, pretty cheap fun. Mine took Sten mags so that was another plus.