Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Do not buy this product!

The cutter comes with no useful instructions about inserting or removing blades. Trying for 15 minutes, I could not make the seemingly helpful instructions provided by an Amazon reviewer work; the blade wouldn't fit in, and eventually I stopped, afraid I'd cut myself on the very sharp blade, fooling with it. This a dangerous tool, and it should be avoided. I have returned my cutter to Amazon for a refund.