Linchpin Useful?

Has anyone used Linchpin on a linemen? It states that it improves blocking for entire Oline. I cant tell if it works or not. I want to believe that it has helped me in the run game but that may just be my imagination. 

Let me know!

I noticed better blocking once they get to the second level but oline still gets insta shed randomly

It does impact the run game. Basically what it actually does according to abilities.fyi is increase the amount of time your oline can hold their blocks. Note the defenders can still shed if you touch sprint like they normally do or have inside stuff/no outsiders. Sometimes it feels like it works other times it feels like it doesn't do anything. But that might just be an opponent who is good at stopping the run.

I think it's useful enough that I'll equip someone on my oline with it if they can get it for free and there's nothing better. But it's not the most important oline ability and if it comes down to secure protector or linchpin, I'm always taking secure protector.