Not nearly as light as the Glock factory trigger. About the same as the NY1 trigger (I have that in my G22). With the S&W DAO trigger, you can count on a reasonably consistent pull throughout the course of the trigger travel. With Glocks, it's almost like a 2-stage triiger (this is because of the trigger safety). I also find that, with extended firing, the Glock trigger safety wears into my finger, although this is not a concern for defensive purposes. My XD9 trigger seems to be lighter than the Glock trigger and therefore the Smith trigger, however there does seem to be a pronounce mushy or spongy feel compared to the other two (this is not really so bad, the trigger safety does not do nearly as bad a number on my finger as the Glock). Don't have any experience with the Sig DAO trigger (all my Sigs are TDA).