Old thread but..
I have had a overwatch tac trigger in my g19 since last year

Have still yet to find the connector/spring combo that I truly like..maybe I'm trying to hard but I still think I can get it better..I phuck with everything..lol..

But a lw, ghost , dot,std 5.5 glock, and stock spring and zev extra power spring
Haven't tried and different aftermarket strikers /striker springs , just a good inspection and polish of what needs to be.

But compared to stock it is much better , nice flat face to finger and out of the box it is a shorter take up to the wall..but still (for me atleast) it's more noticeable then I was led on , but still better all round for me and GLOCK triggers..I have noticed I do shoot a little better..as far as groups before and after..

I still need to round up a minus connector to try, seems most like the dot and minus with this trigger