Instruct: Classify a given review into positive or negative sentiment.
Query: Haven't been able to try them yet, but they are sharp!!

I read a report that said each and every GINSU knife is tested 100% by cutting through a 747 commercial Airplane prior to packaging.The UPS guy left the package on our front stoop and they are so sharp, that the weight of the knives alone caused them to cut through the package, then through the concrete stoop, through our foundation, then through (we assume) the Earth's mantle. We are guessing they are somewhere near the Earth's molten core by now and wouldn't be surprised to find out they cut through it completely and appear somewhere on the other side (China??). If you are in China and you see my GINSU knives pop through the ground, please contact me as I want them back.They are gone forever. We never got to try them, but are pleased to report without a doubt GINSU are the sharpest knives ever.