Any can opener that I tested will get the job done. I've seen a few videos of folks cranking through cans with Victorinox can openers, and I think my P-38 would stand up in time-trials against a person who has their technique down on a vic, but the Swing-A-Way opens a can much faster and with much less effort (and leaves no jagged metal). It's not a big thing if you're only opening one can, but if you're making dinner and have 4 to 6 to open, it saves a lot of effort.
Another thing that the hand-crank can do is take a lid off including the seam, by cutting through the side, and leave a nice smooth edge. Not something that needs to be done often, but occasionally.
We eat a fair amount of canned food, and I don't care for electric can openers. The hand-crank one I have is very quick, very comfortable, and does an excellent job. I'm hoping the EZ-DUZ-IT redeems the slipping reputation of the Swing-A-Way.