Has anyone installed one of these drop-in triggers from CMC? The look of the straight trigger intrigues me and I wonder how it would feel in comparision to the normal curved trigger.

What would be the advantage of one of these triggers over the stock trigger my Bushmaster has?

And what is the difference between a one stage and two stage trigger?

I have a Winchester Model 70 rifle, is that a one stage trigger? And would my Glock be like a two stage trigger? Is a two stage trigger safer?

very,very easy to install
"Is a two stage trigger safer?" this may start an interesting conversation. my opinion is a lighter trigger is not as safe because an AD is easier. yeah i know the rules but people break them, plain and simple. if it's easier for your weapon to discharge when your trying to fire it, it's easier to discharge when your not trying as well. saw a guy shoot himself in the leg with a 1911 "race gun" when hot brass went down his shirt.
advantage of match trigger-lighter, crisper trigger pull , enhances accuracy
i have a CMC single stage, curved, in my AR and love it