Amazing the replies here...
I actually work on quite a few of them.. Usually a small part swap, upgraded sights, trigger etc... Never had a return after cleaning or upgrade...
Quite a few of these pistols have run over 250,000 rounds without failing, they seem to hold together well.
Large capacity magazine, and being a handgun, kind of rules out 99% of Canadian civilian gunowners opinions
Quite repairable, Many parts have been updated by Glock to a newer improved part over the years (magazine followers, trigger bars, extractors, ejectors, etc). Since most parts cost just a few dollars, not a big deal.
The later GEN4 Glocks do seem to have some problems, in some models...
Glocktalk is the place to get informative correct Glock information... Not opinions..