There was a good article on it in Popular Mechanics recently. It is hugely stronger in shear and pull-out than a conventional nail. Builders aren't going to like them because they are so hard to pull out. I’d insist on them if I lived in tornado or hurricane country. As I recall they were only 10/15% higher than a #2 common. A small price to pay for the added piece of mind.
"I am enclosing two tickets to the first night of my new play; bring a
friend...if you have one."
--George Bernard Shaw to Winston Churchill
"Cannot possibly attend first night, will attend second..if there is
--Winston Churchill, in response