I previously used a basic hand operated can opener.  Because of some arthritis in my hands, I decided to get an electric can opener.  This one is made to open tall cans.  I tried to open a 22 oz. can which was more round than tall.  The can opener magnet could not hold onto the can and I ended up having to open it with my hand operated can opener.  I also opened some cans of tuna fish which drives my pets wild.  I can usually let them lick the cans, but the HB can opener left a jagged edge which could have injured them so they just got excited for nothing.
When you remove the cutter to clean, it is difficult to put it back on the can opener.
Otherwise, it works for ordinary 15 oz. and smaller cans. [This review was collected as part of a promotion.]