Update on this
@Freedom Forged
I purchased the Overwatch Precision TAC Trigger for my Gen4 G19 and have put about 2,000 rounds on it as well as hours of dryfire practice. I am just starting down the road of serious shooting and improving so consequently my exposure to other triggers and setups is limited, so weigh that into your consideration when reading this. Scott Jedlinski wrote an in depth review for this trigger on the P&S main page which showed recorded drill times so I encourage you to read that as well. I am just beginning many firing exercises so there are too many variables for improvement right now for me to point to this trigger and give it the credit.
My internal setup was stock except for a 6# Wolff Competition Trigger Spring and the Overwatch Trigger Assembly.
Make note that Overwatch recommends using the "dot" connector with their trigger assembly in a Gen 4 Glock, and the "minus" connector in a Gen3. Out of curiosity, I installed the "minus" connector on the Gen4 and I found that it resulted in the trigger feeling mushier and the trigger break not as defined as when using the "dot" connector.
In my experience during dry fire, I found that the wide trigger face allowed me to really find a finger placement that worked. I have larger hands so giving more real estate to control the trigger pull was a plus for me. The little ledge at the end of the trigger face on the TAC trigger seemed to keep my finger in place and find home quicker as Scott also experienced.
One of the things I appreciated with this trigger is that there was a consistent and defined wall. I really seemed to learn the gun and learn the boundaries where the trigger was going to break for every shot. This trigger is not as light as some of the other aftermarkets available, but I knew my limits with this trigger and felt there were no surprises when at the range. I wasn't expecting this trigger to be a hotrod, and I wasn't disappointed.
The reset was crisp, audible, and tactile for me which I have come to enjoy more than other triggers available that I have used. During dry fire, I experimented with closing my eyes and feeling the gun reset. There were no guesses with the OP trigger.
During live firing, much of what I learned about the trigger during dry fire translated well. The trigger seemed to highlight problems I was having with my trigger pull as well as slapping the trigger letting me correct as needed. YMMV.
I will be taking a Sentinel Concepts class in May so I will be able to see how it performs in a working environment. Hope this helps.
