I used two pair of the Oakley Assault boots for a year long tour in Iraq.  I rotated my boots so wear was distributed.  I used a soft brush after each mission and after a normal duty day.  I kept loose threads trimmed and the ends tacked down to prevent unraveling.  Additionally I aired the boots and inserts out daily.
PROS: Very comfortable. I wear a size 9 regular width, but I got the boots in extra wide to allow for foot expansion in the heat.
CONS: Rapid tread and thread wear.  My job involved about 50% walking and 50% riding.  I experienced considerable tread wear 4 months into my tour. Threads began working loose about 3 months into my tour.  I replaced the boot laces on each boot twice. By the end of the tour I had bald tread and uppers that had separated.  A local cobbler stitched the uppers together to get me through the last month of my tour.
CUSTOMER SERVICE: My experience was YOYO. (Your On Your Own).
OVERALL OPINION: Great garrison boots at a much lower price point. My only other caveat is the squeek the boots make on linoleum type floors.  Very unnerving when your trying to stay quiet.