Admittedly, I've never actually used a product like this before. My hands are pretty poor for my age and I'm struggling with opening jars due to poor grip strength. 

The two part system (gripper and opener) is pretty nifty, especially since they nest together. I like that the gripper makes it so BOTH hands don't need to strain. Without the gripper I would have to hold harder on to the jar. 

It is a bit large to store unfortunately, but thankfully it's pretty flat. 

ONLY ISSUE: The teeth on the opener are pretty sharp and exposed all the time. It would be kind of cool if they had either a guard that popped off or slid out of the way. If I store it teeth side up in my drawer it would cut me!