I shoot a G17 at IDPA matches in both SSP and ESP, the advantage with the Glock using the "Safe Action Trigger" is you compete in both those divisions with the pistol staring in the same condition unlike DA/SA where you start with the hammer down in SSP and up in ESP.
The reliability is exceptional, the only malfunctions I had were "stovepipes" and it was usually pilot error.
I purchased mine used sometime in the early 90's, it was a factory reconditioned pistol with alot of holster wear and has even more now. She may not be the prettiest but I would bet my life with her.
Another advantage is that parts are relativley cheap as compared to 1911's and most can be installed yourself, its just a matter of swapping out.
Now about the trigger, I know it stinks, and there are parts that can help to some effect, but if reliability is more of concern you just got to get used to it.
Allen