From personal experience, I know that using a traditional can opener to open a can takes way to long, and those under the cabinet ones look ugly and are tricky to use sometimes. It’s also a task for someone who is a bit older; they just don’t have the strength in them to do it.
This gadget is supposedly a hands free can opener. All you have to do is secure the opener on the can, hold a button for a second, and then the opener will travel around the can giving a clean cut. That means no sharp edges when it comes off, and the lid will come right off, there’s no pulling it and having half the contents come out on you. (Tomato soup does not come out of clothes very well, especially white ones) It can also handle larger cans, but for some odd reason, that requires pressing the button twice.
The opener is pretty portable, too. It’s only 6.5” long, and weighs just over 7 ounces; easily pocketable. There’s no need for a plug, either, two AA batteries will open about 100 cans before needing replaced. Because of the portability the opener is great for camping and hiking, you might want to bring a few batteries just in case, though.
The hands free can opener is a Sharper Image original product, which means they thought it up and developed it. It’s available from their website for $25. It’s a small price for something so convenient and simple to use.