I really like this can opener! There is definitely a learning curve to it, and realizing that the magnet has to be lifted from the side, but once you figure out the connection points, it works really well, and is SUPER sharp (be careful!). 
We have tested this with standard 15 oz. cans as well as 30 oz. cans, and found that the magnet/can opener mechanism is strong enough to hold it on its own – which is great! I also really love that the top part is removable and dishwasher safe – I’m convinced all can openers should be easily washed, or they get dirty/dull quickly. 
The can opener also looks great on my counter, and I love that the cord can be tucked into the unit when not in use. Overall, I am really happy with this item – it’s a really great upgrade from my previous handheld one (different brand).