We bought 3 can openers within 3 months. The could not even cut paper if they tried. I did resort to using a knife to open a tin...something a little on the dangerous side. Luckily I bought a can opener that was a little more on the price side and as a result have been having huge success. So I have had my struggles with the can opener but I can say this - right now I am winning! LOL
I'm left handed and used to struggle so much with cannot openers. I got one that is meant to suit lefties, and I managed to work it for a while, but for some reason, I've started struggling again. I've stopped using that one now and finally found one I can use.
I have tried the standard one and that was difficult to use, so got one of those new white ones which takes the whole lid off and could never get it in the right spot. So the one I use now is my son. So much easier!
I am unable to use one hand. The only one I can use is the top opener that travels on batteries. It doesn't work on all tins - just goes around. I wrote to Jamie Oliver to find out what he uses. I don't expect a reply. He doesn't produce can openers!