Yeah, it's hard to describe to those who have not shortened the trigger travel just how much better - "cleaner" the trigger let-off is.
On the other hand I have a friend who SWEARS he LIKES the half-mile trigger pull, so each to his own....but I think he really doesn't want to bring me his rifle - again for more internal work.
While the trigger travel mod is more for individual preference, just like some rifle shooters want the lightest, crispest trigger release possible, while others are perfectly satisfied with what the factory delivered, the "Hammer Strut Mod" is the one that I'd be issuing a "recall notice" on if I ran ATI/GSG. A blow-back action that allows the bolt to "jack back" half a case length before encountering full resistance...it boggles the mind that companies have gone so far overboard trying to include all manner of built-in "safeties" that they patently ignore the laws of physics and end up creating a less safe design...but as long as it's "safe" from the operator's finger that's all that counts. The chamber can be blown out by a cartridge, but hey, that's what warranties are for! Won't be too many warranties being honored after the SHTF...just my "opinion" of course.