Seeing that you haven't gotten much response, I'll give you mine.
I don't have the Elf 3-Gun trigger, but I do have 2 of the Match triggers & I'm not exactly sure what the differences are but I'm pretty sure that it's not much.
Mine are set at 3.0 lb & they maintain the setting well, virtually no creep or movement before it breaks, reset is extremely fast & Elf triggers have a half cock notch similar to a 1911 as a safety feature.
When you put your finger on the trigger, you'd better be ready to shoot because as soon as you think about it, the gun is going to fire.
I think they are great triggers & are better than any CMC ever built; the only one close is the Rise 535 & if it were adjustable, I'd like it better as the reset is faster yet, IMO, but it's a fixed weight trigger that is supposed to be 4 lb, but it actually weighs a little more but it is even more crisp than the Elf with just a slightly different feel.
If it was 3 lb, it would be perfect...............but I can't complain as they gave it to me gratis.
If you want & can deal with a single stage trigger, you won't be unhappy with an Elf.
Here's some interesting reading that based on the triggers from the test that I have, I'd say the report is pretty accurate.
www.thetruthaboutguns.com/2016/04/jeremy-s/ar-15-drop-in-trigger-roundup/MM