Can't say that I've ever fired a so called "standard" trigger more than once or so on an AR.
My RRA (16") has one standard from the factory, and I don't see how people get along without them. It's very smooth and crisp. Some don't like them for carbine classes, and I wouldn't recommend it for bump-firing, since it tends to have the hammer ride the bolt forward, but I like mine.
One caveat is that supposedly the NM triggers are "tuned" to the individual lower they're installed in at the factory, whereas one that you install may need some tweaking. I could be wrong. Hopefully bigbore or one of the RRA mafia can help out if I am.
The other ARs I've shot were a 6.8 SPC build (gritty, nasty trigger...felt like a MAK-90 I shot once), and an adjustable JARD (sp?) trigger on a 20" tack driver setup that a guy at the NRA range let me play with once. The JARD was very nice too, but single stage.