I recently got a pair of FC-206 cutters.
My thoughts are that they are good, well made, sharp, smooth, etc. Honestly, so are my USA Craftsman Pro (Wilde?), Knipex, Klien, & Channelock
I added them to an order I was placing, really just out of curiosity to see what all the fuss was about. I love me some good Japanese tools and like I said, these are good.
Nothing stands out that sets the Keiba's apart from my others, cant say I'd go out of my way to recommend them with so many good competitors available...