My only experience with APEX trigger systems is on my Glock 17L Gen 3.
The factory polymer trigger was a bit rounded and the safety tab stuck out a tiny bit even when “fully depressed”, making for an irritating thin-trigger feel that had to go.
I don’t know how home-repair friendly the SW is, but in the Glock it took an inexperienced me about 15 minutes to take out the factory trigger and replace it with the APEX. (I’m now a Glock armorer so it will now take me under ten minutes
)
This trigger has a lighter and cleaner press than the original, with zero stack or stage to the press that averaged 3 lb 12.6 oz for 5 pulls on the Lyman gauge. (Factory weight was set at 4.5 lbs) It stops right at the release of the striker and the reset is positive.
The trigger itself is all metal rather than plastic, and the safety blade is not only very smooth in operation it fits flush inside the 3/8” wide smooth trigger face. The face is rather flat, with a bit of a lip at the bottom to keep the trigger finger on it should your grip be less than sturdy.
I looked at the APEX site and the S&W trigger has a similar shape but looks to be all polymer. This shouldn’t be an issue, especially with the reduction in pull weight APEX offers (2 lb reduction over stock).
The APEX website was selling the S&W kit for under $55 bucks, which is less than half of what I paid for my Glock trigger kit (I got it for $120 on sale).
If you’re not enamored with the stock trigger or pull weight, 55 bucks isn’t an expensive buy at all to improve the trigger weight and change the feel when shooting your S&W.
Good luck with your search.
Stay safe.