For some reason I decided that I wanted a Gen 4 G19 to go with several Gen 3's.
After a lot of reading and not seeing any available I was skeptical about the quality and reliability of the Gen 4.
Then I walked into the Gunstop and there it was, brand new, test fired this year Jan. 18 2013.
I brought it home, cleaned it and loaded several magazines.
In the first 200 rounds, I shot 4 different reloads and some Federal Hydra Shok.
The ammo was 115 gr, 124gr and 130 gr. Bullets were poly coat, FMJ, and JHP.
The trigger reset felt more crisp than my Gen 3's, the recoil felt less, but I don't know if it really is.
There was not a single failure of any kind. It did not spit brass into my face. It ate 115gr just as well as 130gr.
So based upon that initial experience, it's more Glock Perfection to me.