Strengths: The grip is good on rock, grass and mud. A good, tight fit, which is what you need in this type of shoe. Much more comfortable than my old Walshes.
Weaknesses: The laces seem to wear out a little fast, although that is a minor niggle. The grip is not quite as good as the Walsh pb on soft ground, and the shoe is pretty unforgiving if you have to run on the road.
Overall: A great shoe for of road running, all year round. If we have hot dry conditions (do we ever?), a more cushioned shoe would be more comfortable, but in normal conditions, these are ideal. I even get some traction on ice (not much), and they are great in snow.