I had a Emerson Commander, the bigger one, and my only concern was making it 'go' when it should have, and vice versa.

I practiced with the knife. Sometimes it opened 'half way,' but you didn't know that until you 'presented' the knife in your line of sight. Sometimes it didn't open at all.

One time I took the knife out of my pocket for some mundane chore where speed was not an issue, and I found the knife 3/4's open and I almost cut myself.

There's a learning curve here, and it's your obligation to practice.

I never liked the 'chisel grind' feature, to boot. My friend wanted the knife, and it was sold quickly. It was just not my knife.