I bought these shoes since I am registered to do a Tough Mudder in October and all other reviews were positive, especially for this race in particular.  I trail run with my dogs in the morning, and these are NOT the shoes for that.  They are extremely slippery on wet rocks.  I have been running in them for over two months hoping they would scuff up and get more traction, to no avail.  If you want to run in wet rocky conditions, these are NOT the shoe for you.