The DCAEK I installed in my M&P9 was worth every penny spent and then some. It addressed the only shortcoming in an otherwise amazing pistol giving it a trigger on par with or better than some of my favorite steel guns, including SA's.
IMHO, too much trouble to keep track of who's who without some kind of access to the membership list, which could be very large.... (I'm a mod on the Buckeye Firearms Association board. We get a ton of new members a month, and only about six seem to be real. That's a very small board, too, IMHO....)
That said, I've got two DCAEK kits (and two RAM kits), and planning on a third set for an M&P9C that's due next week. The RAM is kinda "feel good" for some people, but the rest of the goodies make the M&P "right".... I had the opportunity to compare 'em side by side - with and without the DCAEK kits - and was amazed. I also handed both guns to some unsuspecting friends (unloaded, on the range ), and asked them for an opinion without telling anybody what was going on. The DCAEK kit won....