extreme easy access heel, to start with. Also, comfort contours all across without losing the T-shape, the lower horn has been relocated (betcha didn't see that one!). Angled headstock for improved tuning stability. And all the other trimmings Aristides is known for (excellent playability, stainless steel frets, virtually no need for neck adjustments; hardtail, t-bridge, trem, floyd and evertune bridges, almost every pickup config you can think of).