GURU TIP:  The support changed from medial posting to a 3D Guidance System which is three key components—a wider base, a beveled heel and a forefoot flare. 

TECH TIP:  Do you want softness and more energy? Asic’s 2000 v12 will be your next best friend.  Their Flyte Foam gives runners the responsiveness they desire. It’s lighter and a has smoother heel-to-toe transition. The midsole is updated with a full-length FF BLAST™ PLUS cushioning unit and PureGEL™ technology. These features help provide a more energized toe-off with cloud-like softness underfoot.
Meanwhile, the 3D GUIDANCE SYSTEM™ consists of wider basenets and an increased heel bevel and forefoot flare. As a result, you’ll experience a silky-smooth transition from footstrike to toe-off.  

BUY THIS SHOE IF...you just need a little support

DON’T BUY THIS SHOE IF...you have a neutral stride