Strengths: Rolls fast. Awesome traction in dry conditions. Slow wearing.
Weaknesses: Packs up with mud quickly, easy to overpower on smooth rock and roots.
I have been using these tires for a year now and like them. They grip well in the dry except when used on smooth rock surfaces or roots, in those conditions it's easy to overpower the rear traction. I have been running the rear tire mounted backwards for a few months to improve traction and it's working. I have about 450 miles on this pair of tires and they show little sign of wear.