I was disappointed that the actual Glock 4.5# connector (it used to be called the 3.5# connector) is a restricted part from Glock even though it is used in their competition models. This is true even for Glock Certified Armorers and law enforcement (unless they get their chief to sign off!)
Surprisingly, my LGS actually carries the Lone Wolf version in stock! No shipping or wait to get it.
Now, here is a silly disclaimer: This post is strictly for education purposes. You need to be make sure that in your area it is legal to install a lighter connector, use after market parts, shoot a firearm, or even read this post. I am not endorsing or encouraging it. Additionally, I am not going to tell you how to replace the connector or where to get parts. I will not tell you that original Glock minus connectors are available on line or to get an aftermarket one from lonewolfdist.com and that you can find how to videos on youtube.
So, about 30 seconds after getting home I installed it (that's how long it takes to install). The difference? Actually not much. Not nearly the dramatic 'hair trigger' that some have made it out to be. However, the trigger initial stacking (not the dead space slack) is reduced. What I am talking about is the point after the take up and you feel the initial resistance to the trigger being pulled back. My stock trigger feels like you have to increase pressure to get past it, whereas this one does not. I like it. I will mention that this is true of my 23, but my much newer 27 doesn't seem to have this stacking.
Trigger reset is supposedly improved, but I couldn't really tell. Personally, I think the whole "trigger reset" is more academic than practical. Even rapid firing I have never been taken back by a pistol's "spongy trigger reset."
A really popular combination is the lighter connector, commonly called the minus (because of the '-' marking) along with the NY trigger spring which makes the take up feel a little heavier. This would be a good combination to give the user an OVERALL trigger pull similar (if not a little heavier take up) to stock with a cleaner break.
For those (like me) who find the stock Glock trigger's "sproing" to throw you a little to the left (it also doesn't help that I am left eye dominate) this may help.