By Hills McGee (New Hampshire) on (Apr 18, 2014)
Comments: I have been running in pain for the past 4-5 years. I have had reoccurring metatarsalgia and frequent knee pain. The first run with the 3-sum was completely pain free. And so far, I have had 10+ runs to the same tune. This shoe is stable, lightweight, and has corrected my running form to be much more efficient and faster. Highly recommend this product! Well done Altra!