loved this shoe. Got a spirited knee that day due to a football injury. The cushioning of the insole combined with the Zig technology made my run painless. Almost every year I've bought a new pair and given away several pairs. However, this latest model is very different inside. BUYER BEWARE: Reebok gave this new outsole design a technical name that I believe is intended to distract the wearer from the fact that the outsole is now paper thin. It may seem to cut the budget, they made the insole cheaper. There is no depreciation or amortization. It was just difficult to walk on your feet in it and uncomfortable. I had to send them back. A colossal disappointment. Too bad because it WAS such a great shoe and they ruined it.