I have at least a dozen Xinzuo lan series knives and I haven't had a problem with any of them. They come razor sharp, they look amazing, and hold an edge very well. I haven't had to sharpen any of them yet, but I am a little concerned with the day I will have to. Matching a 12 and 8 degree angle on my whet stones might be challenging at first, but either I'll get the hang of it or I'll reprofile the edge LOL.