I'm gonna soon be in the market for a 9MM and my first instinct was to go with a Gen 4 19. I've had three other Gen 3's and loved them (sold them foolishly), I just always wished the grip frame was a bit smaller. So I'm interested on actual (not perceived) issues with the Gen 4's. I'm aware of the spring issues, and that was resolved. But what are the other issues? I know some are just dyed in the wool anti-Gen 4, but why? Ergonomics aside, what are the issues? I'd really like to get an objective thread going with actual performance issues or parts breakage. I didn't think it was that big of a difference between the Gen 3 and 4. Mechanically the spring is the biggest difference. To listen in on the other threads you'd think Glock was half way down the crapper. But I haven't seen anything other than the spring growing pains, and unsubstantiated MIM rumors that lead me to believe there is any real issues. I could be wrong though, that's why I'm asking for help. Please keep it factual, I know there are a lot of opinions about them, but that's for another thread. I know a lot of guys will say get a 3rd, but I really like the smaller frame. Hopefully we can clear things up and maybe help other prospective new buyers.