I've got a bunch of Glocks. Got some Sigs, a Colt, a couple of Kimbers, couple of Rugers, couple of S&W's, and some others too, (plus some rifles). The Glocks aren't any "better" than any of the other guns. The machining on the Colt, the Kimbers, all of the revolvers just emphasizes what a piece of tupperware the Glocks are. Most of the other handguns are single-action, and the triggers are so much better than the Glocks that it's almost funny.
But - when I shoot any of the Glocks, whether it's the single stack 43 or the full size framed 31, 17, 34 or 41 - the controls are the same, the grip's the same, the "feel" of the gun from drawing it to managing the recoil is the same. They go bang every time, I don't care if I drop them in the dirt, I don't care if they're scuffed. When I look at my scores for competition, the gun isn't the problem. It's doing everything I need it to do. It's me - I need to be faster moving to the next target.
So, when all's said and done - Glock works for me, because I can focus on what I'm doing, not on the firearm.
As for the G19 specifically - I finally got one, won it in a raffle along with a Sig P320. It's a Gen 5, which means that it has a different grip than all my others, (mostly Gen 4's), and it has an ambi slide lock. It points fine, it works fine - just like every other Glock I have. I added Talon Wrap to the grip as I've done on most and left it along other than that. It's small enough to carry concealed easily, (as opposed to my 17/34/31/41), but has a double stack mag with standard capacity of 15.