After recieving these shoes in the mail I put them through a test to see if they actually do what they state they will. The overall performace of this shoe suprised me on how well the sensor recognized what type of surface you are running on. I started running on a gravel road and the cushioning in the heel was somewhat soft. I then traded over to a dirt road and I felt the cushioning change to a harder volume within four steps. I could not believe that the change would incorporate that fast. The only con about these shoes is that that cost $250, but granted they do have a sensor chip in them and they are new. If you are able to spend the money on these shoes I would highly suggest it if you are a runner
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MMATrainer.com Founder
Travis Dykhoff