It requires you to utilize a variety of stabilization muscles that wouldn't typically be used for basic lifts, especially for higher repetitions. (onnit.com)
They may vary in appearance, but they provide the same basic lifting motion, using a weight stack for resistance. (bodybuilding-wizard.com)
It focuses on the big basic lifts, it provides video and written tutorials to ensure that you use proper form, and it provides a basic structure on which you will thrive. (2x4strength.com)