This is a great exercise for many reasons. Its great for hip dominant/posterior chain work, double extension, power, power endurance (Yes I know that is an oxymoron), and conditioning/metabolic training. I also use it to teach a "hip snap". So it is one of our first things we use in Olympic Lifting progression.
If you haven't incorporated Kettlebells into your training or your clients training, I recommend starting now. There are a number of things that a kettlebell can offer, that no other peice of equipment can mimick. Click on the kettlebells to purchase one today.