Outside of the trigger it's one of the very upgrades worth making on an AR. I've bent one of those stock charging handles, and I don't even use ARs that much.
I don't upgrade triggers either. WHAT?!?!?!?! I know that blows some people's minds. I don't think my finger is sensitive enough to feel the difference between all the different triggers. I shall turn in my ODT shirts, patches, and stickers at the next meeting.