Mark me down as another highly satisfied and impressed customer. I picked up a replacement concave cutter, some tweezers and a few other assorted tools. All are very well made, and the customer service couldn't be better. I ordered on Monday I believe, and the package arrived on Friday.
Frankly, with the prices and quality, I would stick with them and not bother with the tools offered by places like Stone Lantern (though, the Okatsune brand that Stone Lantern carries are very nice and some of my favorite tools in my bad). The Kaneshin are much better quality for great prices.