I own a 43x with 1200 rounds through it. I like the polymer, grip texture, and general construction of the gun.
I find the finish wears just like any other Glock. There is wear on the hood of the barrel, breach face, and anywhere there is lockup. I prefer the feel of Gen4 finishes, but I have no complaints about the 43x finish or color.
I’ve been getting consistent ejection, and zero brass to face from the 43x.
I initially fired slightly low and left with the first few magazines. I found that I needed to change my grip compared to a G17/G19 sized pistol. After 1200 rounds I can say that I consistently shoot low with the 43X. The way I like to shoot a pistol is to have the front sight blade right under X mark of a target. With the 43x I would obscure the X mark of a target with the front dot. I find that I’m not quite as accurate with it as a G17/G19.
In 1200 rounds I had 3 failures to fire with light primer strikes that I think were user induced. If my memory was correct it was between the 500-800 round mark. After a complete teardown I found the firing pin channel was filling up with what seemed to be ultra-thin primer shavings, a small bit of oil, and carbon. It went back to having consistent ignition after a thorough cleaning.
I get no slide bite, but my only issue is that I get painful blisters on my trigger finger during every range trip. It’s my only issue, but its significant enough that I’m looking for an alternative pistol.