Because of the way the Glock trigger works, you will almost always be trading a shorter/crisper/heavier trigger pull for a longer/mushier/lighter trigger pull, so you need to find the balance that worksbest for you. The drop-in connectors simply change the angle that the trigger bar has to push against in order to drop out of alignment with the striker, and you can add various types of springs to change the "feel" as that happens. Some shooters I know prefer as light a trigger as possible, and don't mind the extra trigger travel this requires, while others add in a NY1 or 2 to give a more definite stop point, past which they know the pistol will fire.