Mine is the JYD II. I hated it and complained to Kershaw when I got it. It was so stiff and slow to open, even after loosening the pivot screw. But it gradually wore in, and opens fast now. I carried it to Blade 2009 to exchange it for a looser one, but by then mine was easier opening than the ones at their booth. Now I love the knife. I mean, it ain't no Sebenza, but for the money, it's a solid knife. Since then, I have bought a few more Kershaws as gifts for friends. I have liked them all.