Personally I don't like the feel of a Korean leaver but I can still attest to the quality of this product. AWUK are always fast with shipping, and pack their products correctly to avoid any further damage.
Coming from an sanwa JLF this feels kind of "mushy" in the corners. I understand that some people prefer the Korean lever and for doing electrics in Tekken it is noticeably more consistent on the JLF.
I installed this into my hori rap 4 with no issues besides having to bend the pins on one side slightly to get them to fit in the case but that didn't affect the action of the leaver in any way.
If you're unsure if you like Korean levers or not I'd recommend this due to the price point and ease of installation.