As per the Glock tagline, they very nearly ARE perfect. The ONLY time I`ve personally witnessed a Glock malfunction was when a shooter "limp-wristed" the pistol when shooting. And as per the OP, I love the simplicity, and the proven reliability of these wonderful pistols. They`re a snap to disassemble, and danged if they don`t always go bang when I pull the trigger.
Well they are not perfect as nothing man made ever is. (oh you said nearly.....Oops)
Not to start an argument as that is not my intent here.
I have seen a few burp/fart/go sideways. Seen 1911's and CZ's have issues as well.
None are near perfect.