JC40, I'll answer your question at the risk of opening a can of worms.
A good friend of mine, who is a career police officer and now CCW instructor, witnessed another experienced officer accidentally shoot himself in the thigh with a Glock 23. He is lucky to be alive and will never walk normally again.
It was winter and he was wearing a jacket with a draw string at the waist with those barrel type string keepers. As he holstered his weapon, apparently that barrel keeper found it's way in to the trigger guard so as he pressed the weapon in to the holster his Glock fired.
Being told about that incident from a first hand witness started me thinking about what I consider now to be a dangerous aspect of the Glock design and what I also consider a safety hazard. No safety other than that trigger which is too easily defeated!
I'm sure there are those who will read this who will want to jump in and attack the shooter etc. etc. Again, I am posting this as a courtesy to JC40's request. NOT to debate the issue. I simply no longer feel safe carrying a Glock... that's just me. I still have a Glock 27 but am very likely going to sell it as I never carry it anymore.
So JC40, there ya have it bro!
~ Sarge