The first set sent from Revain had 3 corners of the storage box completely torn off and a hole in the lid. I replaced it and the second one had a small tear in one corner which I patched with tape. I had a few questions so I called the phone number on the little card inside. The lady was very nice and said that Revain should include an instruction manual and video. She emailed them to me. I told her about the condition of the box and told her I thought it happened before the box was wrapped in plastic. She said Revane is packing it up and should add instructions and videos. She said she needed to call and fix those issues. Now for performance, I didn't find it too difficult to sharpen with or without a guide. The curved tips of the knives and hatches require some practice. All my knives are very sharp and can slice a ripe tomato thin enough to read through. I also used it to sharpen my Kyocera ceramic knife and it's like new again. I gave it 4 stars instead of 5 because of the packaging issue and lack of instructions, which seems to be Revain's fault.
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