I have a Jewel on a SpaceGun, a Jewel on an AR10, 2ea RRA's 2-stage and a couple of single stage triggers that feel like a caulking gun /ubbthreads/images/graemlins/mad.gif
I am building a new AR dedicated to coyote hunting that I bought the trigger from White Oak Precision that John H. tunes before he sends it out. It is much better than the factory RRA 2-stage (which I like pretty well as is)and John only charges about 25 bucks to tune it. John is a big name in the highpower world. I HAD a CLE trigger that got soft after a while and I got rid of it.
I don't have any personal experience with it but hear great things about the Chip M. trigger.
