There is a lot that goes into a good knife for the job, steel, edge profile, grind, and so on, lots of threads about blade steels and sharpening, and the performance can vary wildly. I like good tools, have numerous knives that I think are fantastic for the couple hundred dollars I paid for them, but also know when simple, and inexpensive knives work, and own several. I always carry a pocket knife, and most of the time pair 2 knives in order to have the best for the job. The BEST knife I have for cutting loads of cardboard and packing tape is a cheap Milwaukee Fastback with good replaceable utility blades. Opens and closes with a flick, easy to replace blades, locks well enough for it's intention, and relatively compact and ergonomic. The blades have a thinner edge, and lower grind angle than a pocket knife can get away with, so they will out cut pretty much any folder. Blades are also heat treated hard, being there is less than an inch of unsupported blade, and if it does break it's replaceable, so it shears well when push cutting tough and abrasive material.
