Guild Wars 2

Is it worth the points?
How much damage do you get out of it?

Yes, yes it is!

It is without doubt the most used trait for power thieves. In PvE, especially boss fights, it is a very good boost to your dps. In PvP, especially in the current bunker meta, it is very strong for bringing down bunkers. Backstabbing someone, landing a critical hit and they are below 50% hp is usually a guaranteed kill, especially with a heartseeker to follow up ^^

I don’t have the exact numbers, but 20% extra damage is a very nice boost.

Don’t forget the 300 extra presicion and ferocity you get for going 6 deep in critical strikes on top of that trait.

Mandatory in PvE if you want to see big numbers.