[The Cajun]

Is a Glock safe, yes.
Is a Glock less tolerant of a user screw up, yes.
Have had only revolvers until 2 months ago when I bought a Glock G 17, I now think it's the best up close self defense pistol I own.

[The Pack Knight]

Is a Glock safe, yes. Is a Glock less tolerant of a user screw up, yes.

I agree with both of those statements, though it's also worth considering that a pistol with a manual safety can also be pretty intolerant of user screw up when the user needs it to shoot.