I've thought about posting a review of the
Guardian Trigger, but I haven't got around to it yet. Here's the short and sweet: it's great.
Well, a little more detail... I bought a Blue Label Glock last September at the same time I bought a Walther PPQ, the latter because of the trigger and grip feel in my local gun store. The Glock unexpectedly arrived about a week later - I thought it would take months.
The out-of-the-box trigger on the G19 was awful - over the eight-pound limit on my RCBS Trigger Gauge. I'd call it nine or 10 pounds, easy, and creepy, dragging. It was a poor trigger. Given that I had the PPQ, I figured I'd either sell the G19 or fix it.
I looked at a few aftermarket triggers, but settled on the GlockTriggers Guardian, mostly because they gave me a 30-day return guarantee, assuming I didn't fire it with live ammunition.
Installed, the trigger was the difference between night and day. Instead of a high weight trigger pull with a "wall" before release, this one has a "rolling break," which has normal takeup, then even resistance from the beginning to letoff. There's not even any overtravel to drag off point of impact, though I don't know if that's normal.
It's so good I got rid of the PPQ.