Review on FOOS Carving Engraving Premium Carbide by Noah Lewis

I bought this tool to make very light lines on some of my signs and so far I have been very impressed. I've probably done 25 foot 3/32 inch lines in oak and another 50 feet or so in cedar and it's still sharp. I'm curious if I can sharpen it like I do with my other router. Bits but if not for the price I would just buy another one.