Anyone running b12 IM injections?

I've heard pretty good things about adding it on and off cycle. I have a chance to grab some from a reliable source and wondering everyone's thoughts if it's worth a shot... ( pun intended )

What I'm looking at comes in 10 ml vial at 250mcg/ml. I've heard a lot of different info as far as dosage and seems like the more the merrier?

What's working or not working for you?

Thanks everyone!