Maybe the lack of criticism reflects the general satisfaction of owners? I was chatting to someone who may soon be the UK distributor for Sparx, and he said that a good hand grind was better than a Sparx grind, which rather took me aback. He explained that blades are often bent, and automated machines do not necessarily deal so well with bent blades. My right blade is very slightly bent, perhaps due to the holder, but a Sparx did a good job of sharpening it. I suspect that if a blade is bent to the degree that a Sparx can’t deal with it, then the bend should be rectified.