I installed an Apex flat face set in my M&P9 and love it. Nice smooth trigger pull and short reset. Stock trigger very gritty feeling. If the Glock set up works similarly you'll be happy with it.
Yeah I put the whole Apex kit into my G19. Quite a bit smoother with shorter reset, nicer flatter trigger shoe.
On an older Glock I had a Glock Triggers Haley Strategic or whatever I forget, basically the same thing (smoother parts, lighter springs) but the Apex trigger shape is better for me.
I suspect that you could save a lot of money by just using the $13 Taran Tactical bar but I'm not experienced enough.
I Actually looked at that for my compensated Glock (32C) to kind of make it all target ready; but it only reduced the thing by 1 pound of pull. I didn't think going from 6 to 5 was a huge deal. I was kind of fantasizing going from 6 to like 3 to 4. And I wanted it to be adjustable with an allen wrench like my 1911.