Glock has range rental guns that have had well over one million rounds fired through them. The indoor range near me cycles a new one into the mix every 100,000 rounds or so. And those are 100,000 reliable, trouble free rounds. Glocks have received more torture testing than any other weapon on the surface of this Earth, and have outclassed weapons costing many times more.
Glocks were never designed to be "pretty". It is a self defense weapon, not a Grade VI Citori, or a Weatherby Mark V De Luxe. Tenifer is one of the most durable firearm finishes on the market. It has survived salt water immersion tests, and come out better than any other mass applied finish in the firearms business.
The Glock pistol has an unsupported chamber, and it does not fire lead bullets BY DESIGN. The barrel is throated to give reliable feeding with any type of open nosed defense ammunition on the market. It has Polygonal rifling to achieve the highest possible velocity with the least amount of pressure while shooting this ammunition. Most all Glock "kabooms" can be contributed to shooting either lead bullets, reloads, or all of the above. Both of which are highlighted in the owners manual NOT TO BE FIRED in a Glock pistol. If you run cheap regular unleaded in a Ferrari and detonate the engine, is this the manufacturers fault? Polygonal rifling does not lend itself to shooting lead bullets. Why would anyone carry a self defense weapon loaded with lead ammunition anyway? I don't even know anyone who sells factory loaded, lead self defense ammunition. The Glock is a service weapon, and a self defense tool. It is not a target pistol, and never was designed as such.
I purchased an H&K USP 9. It is not half the weapon my Glocks are. The gun is horrendously over priced. The magazine release is poorly designed, and can easily pinch your fingers, and or break. The magazines are poorly constructed compared to a Glock, and much like the weapon itself, are overpriced costing over twice what a Glock drop free, metal lined magazine costs. The weapon itself has far more parts, is not as reliable, and is prone to parts based failure far more than any Glock could hope to be on it's worst day. I've put tens of thousands of rounds through my half dozen Glocks, and have yet to experience a single FTF or FTE in any of them. I wish I could say that about my H&K that I spent almost twice as much on, and found it to not be half the gun.
I base my opinions on actual results I have obtained, firing tens of thousands of rounds through literally dozens of weapons that I actually personally purchased, own, and shoot on a regular basis. Bill T.