Glocks are a great service weapon. I have never had a problem with any of mine. But mine are 40 cals.
Over the past 15 years I've owned dozens of Glocks including: G17; G19; G20SF; G21; G1SF; G22; G23; G26; G27; G30; G37.
Late last year I sold all eight of my Glock 40 Deathray's. We only have 9mm's and one 10mm now.
Anyway, all of my Glocks have been 100% reliable EXCEPT for one G27 that I bought used for $329 at a gun show. When a dealer (that you've seen at gunshows for 10+ years) has an otherwise mint LOOKING Glock for $329....there is SOMETHING wrong with it.
My Glock round count has to be in the 10k range...they're boring really...
Load; Charge; Fire; Repeat /yawn
Just the way I like my handguns!