During my lifetime I’ve used dozens of different types of can opener but this one is the very best. It is amazingly easy to use and works so quickly. Definitely is worth the money. Make sure you align it correctly in the gap between the cutter wheel and the gadget, the magnet helps guide you in. Press the button, take your finger off the button while it does its work and watch out for the point where it starts to cut and press the button again to stop it when it comes round to that point again. For ring pull cans, tip the can upside down so the ring pull is on the bottom and remove the top. Also once it goes around it looks like it hasn’t cut, but it has. Don’t worry if you don’t get it first time as you’ll definitely get the knack, and when you do it’s great to use, taking the hassle out of opening thicker, stiffer cans. Would highly recommend if you have any arm or hand injuries, or like my mom in her sixties, she doesn’t have the same strength anymore so it’s a great confidence boost for her and a really useful gadget for me.