I say a good buy. Full price? I don't know. I like to hand sharpen my knives with a stone. I would not have gotten the edge on the 154cm with a stone hand sharpening though. I have a few blade that don't have edges that I will be sharpening with it. So for me it is worth it with three blades to do . With my out of pocket expense its a no brainer. If you sharpen axes, hatchets and scissors it would definately be worth it IMO.

If you aren't good at hand sharpening or don't like to. Its worth it.