On a flat ground blade, I would prefer it not have a true zero edge unless the stock is thick and the blade is narrow, as in the CS Spike. The edge that came on my M9LE was quite good, thick enough to be strong, but thin enough to be sharp. I am content to apply my on convex edge to most flat ground blades. A full convex zero edge is another story. Most Bark Rivers come with those, and they are usually strong enough, and always very sharp. But the LEs are more expensive already. Adding a full convex zero edge would cost a lot more.