I've used this shoe for 2 obstacle course races now and am very pleased with their performance and durability.<br />I've done a Warrior Dash (5k) and a Savage Race (6.8 miles) in them. My only complaint is that while running on dry or hard uneven terrain, the deep stiff treads on these shoes make the ankle more prone to rolling/spraining. I found myself really focusing on keeping my ankles stiff because you will roll your ankle very easily running in that kind of terrain with these shoes.<br />As far as soft ground and mud, thats where these shoes give you the advantage over everyone else wearing regular running shoes. You get all the traction you'll need. Steep slick muddy hill? No problem. While everyone else is sliding and falling, youre chugging along. After each race I've thrown them in the washer and they have not warped or anything. They looked like new. Have a Battle Frog race xoming up in a few weeks, looking forward to putting these shoes through a 3rd race.