Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Worst utility knife I've ever used.

This knife is cheaply made and clunky. The process to change blades is annoying and the directions are vague at best. You must push the lever all the way forward, which will unlock the button, which you hold down to insert the blade. This is difficult because this knife is so clunky and difficult to operate. There is a little slot under it for snagging on insulation when cutting it. I don't know how you could design a utility knife worse than this one. zero stars.