Back-it-Ball?

I odered the fraid not ropes that clemson recommends becuase I’m getting sick of doing the same old static stretches but I also ordered this thing called a back-it-ball. http://www.tomdrum.com/bball.php
Anybody ever use this thing? It any good? I have trouble finding stretches to stretch my lower back so I thought it might help.

I like to throw about 6 dozen on the carpet and get freaky with my women clients…

I like the body logic balls.