I hate to be the dissenter here, but the Glock 30SF and the Glock 36 were the pistols that finally made me give up on Glock.
In one the first years they were available, I bought a Glock 17. I shot that pistol for something like 23 years. It went through many recoil springs, magazines and at least one barrel. I put tens of thousands of rounds through that gun. It ran like a champ.
I bought a Glock 21 in the '90s and put no less than 20,000 rounds through it. Again, it ran exceedingly well.
In the last few years, I bought a Glock 21SF. I immediately noticed the infamous trigger bar rub, but the gun ran reasonably well with only a few stoppages here and there.
I also bought a Glock 36. Immediately, I started to have failures to eject and failures to chamber. I changed the recoil spring, magazine and tried many different brands of ammo and simply could not get reliable function with this gun. I ended up selling it and buying a Glock 30SF.
The Glock 30SF ran well for the first few hundred rounds. Then I started to experience the dreaded failure to return to battery. (This problem generated one of the longest running threads in gun-website history on GlockTalk.) The problem started slowly then developed to the point where the gun would not go into battery at all unless I thumbed the slide shut. I changed recoil springs. I changed the trigger bar (because it has "the rub" mark as well). I changed the firing pin safety plunger. Nothing worked. By the time I traded to a dealer to whom I fully disclosed the problem, it was failing to go into battery nearly 100% of the time. Not only that, I could pull the trigger and drop the firing pin before the gun was completely in battery.
At that time I swore off compact .45 ACP Glocks. Then, low and behold, I had a failure to go into battery on my Glock 21SF. I got rid of that gun, too.
At this point, I simply will not buy any Glock in any caliber other than 9mm.
Every company turns out a turd now and then. Colt proves that. But 2 out of 5 of my Glocks were 100% unreliable, and I believe a 3rd was going in that direction. 60% of the Glocks I've ever owned were faulty.