Nike Air Monarch III is a great all purpose work out shoe. It doesn’t twist longitudinally (torsional stability) and the outsole is thick and doesn’t flex in the forefoot. Here is an image of a new pair that was brought in to me today.
The best foot type for this shoe is a narrow, deep foot. Notice how the angle from ankle to toe is a straight line? This is the best profile for a deep foot.
The outsole above is more rectangular in shape, as opposed to inverted triangle, which usually matches a narrow foot.
The downside to this shoe is it has a soft heel counter (back) which will cause the shoe to wear faster than if it had a firm heel counter.
All in all though, this is a great shoe, especially at a $60 price point, for the narrow, deep foot type.
Dr. Jenny Sanders Shoe Blog 