I don't own any, but I know a person who collects those cheap knives made in China.
The ones I have handled are shaving sharp, seemingly much sharper than many of the American made knives. For a 4 or 5 dollar knife, they appear to be very well made. I don't understand how they can make a knife of that quality so cheap.
As far as how long the blade would stay sharp, I don't know. I don't know anything about the steel or the heat treatment.
As far as the sharpness of custom knives, there has been a lot written on this forum about sharpening and edge geometry and sharpness, and how much they can be used and still stay sharp.
I have made several hundred knives, and my experience, with the steel and heat treatment I use, just does not coincide with much of what I have read here.
