I received a manual Kitchen Aid can opener as a gift off my wedding registry about 6 years ago.
It always did a poor job of opening cans. It would leave parts of the lid connected, it would eat the paper wrapping off the side of the can, it was heavy and difficult to hold.
The other week I finally had the idea to go buy a new one and because I'm sick of Kitchen Aid, and because this already had high reviews, I bought it.
And, I love it! It's light-weight, but does the job on the first try. No shredding paper labels onto my counter top. I get a completely opened can the first time, every time.
If you need a manual opener, get this one!