I put a ACT in my SPR build with yellow springs along with a take up adjuster bolt through the grip and it's a lot better than a stock kit for that purpose.
Pull weight is in the 3lb range. Do note that I had to bob the hammer to get reliable ignition. With a full hook on the hammer with yellow front and back I was seeing some FTF's with CCI primers. Not a lot but even a few when previously I'd never had one was too many. I used a dremel to drop about half the hook off the hammer under the rule, you can take more off, you can't put it back and I've had no FTF since. (lighter springs means you have to have a lighter hammer i.e. faster velocity to get the same force impact)
I am about to make a G2S-E purchase I think, there's still just enough creep that I don't like it in the above set up that it bugs me and I think is keeping me from hitting my full long range potential with the rifle. On very good days it's a sub 0.5 MOA shooter and I think a better trigger will get me more better days.
But for all but the most OCD shooters or LRP shooters I think the ACT is a great upgrade IF your stock trigger is gritty, creepy, heavy. If your stock trigger is a good example of one and I have a couple then you won't see as much return for your dollar.
If you do go yellow/yellow then you might have to lighten the hammer up to get reliable ignition. Shoot it before you bob it though, just to confirm.