This is my first pair of Mizuno's.  I purchased them based on the reviews from other purchasers.  I'm not a runner but do frequent the gym (elliptical and treadmill) and walk outside for exercise.  I can see why they're a running shoe because the form, cushion and fit are made for running.  After a few months of wearing I find them very comfortable in the toe box (purchased wide width) but I did insert additional arch support.  But even though I did insert extra support the shoe more than easily accommodated it.  If I didn't already purchase 2 other shoes I would have purchased another pair of these for the future.  For my first (and not my last) I was quite pleased with its performance.