I was so surprised when I got this knife from a friend. Full of chips on the edge, broken tip and oily blade. I couldn't imagine what the knife had been through. In such situation, you definitely need to start with a coarse stone with high grinding power. #180 grid, #200 grid, #220 grid, and #240 grid are good choices. When fixing the chips, you might want to raise the sharpening angle a bit higher in order to fix everything faster. And then lower to normal angle when the chips are gone. After fixing work, I suggest that you cut a piece of paper slowly to feel any stop caused by tiny chip(s) during paper slicing process. Below is the ranking from my side. I hope it helps you for your decision.

Budget: 🌑 🌑 🌑 🌕 🌕
There are two different versions. One with stone holder, one without. I would recommend the one without stone holder. Good money for the quality.

Abrasive: 🌑 🌑 🌑 🌑 🌕
Very fast cutting. Great grinding power.

Fineness: 🌑 🌓 🌕 🌕 🌕
It is coarse stone. But if you do everything right, you still can cut news paper easily.

Load up (self-clean): 🌑 🌑 🌑 🌑 🌓
This stone cuts so well. So you don't really see black metal particle.

Polishing: 🌑 🌕 🌕 🌕 🌕
It's a coarse stone.

Durability: 🌑 🌑 🌑 🌕 🌕
I would say it's between 3 to 3.5 points. The hardness is good enough.

Tactile Feedback: 🌑 🌑 🌑 🌑 🌕
It is very right tactile feedback on a coarse stone. You don't want to feel smooth on a coarse stone, but only grinding power.

Sharpness: 🌑 🌑 🌕 🌕 🌕
If you do everything right, you still can get good sharpness and cut news paper very easily.

Convenience: 🌑 🌑 🌑 🌑 🌓
The stone is splash and go. It only requires small amount of water. Easy to clean if you don't really need to. lol

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