The chefs choice turned up in the mail Wednesday, and I reckon it's pretty damn good! I tested a lot of different knives on it, and as long as the blade isn't too damaged it will get it extremely sharp. As for razor sharp? I think that depends on the quality of the steel. The Mitchell knife I ordered came fairly sharp, but after running it through the machine it is pretty much razor sharp and will shave hair off my arm. Some other mid priced knives went from blunt to the point I could run a finger up and down the blade with reasonable pressure, to super sharp in about 30 seconds. The cheap filleting knives came up very sharp, not quite as sharp as the others but plenty sharp for filleting fish. I've got some reasonably good quality chefs knives packed away in storage as we're between houses for 6 weeks, but I'm confident they'll sharpen up to a near razor edge too. I reckon it will sharpen knives to as sharp as the quality of steel will allow. Highly recommend one for the man cave as it make sharpening knives a 30 second job, no matter how blunt the knife is.