Strengths: Wonderfully light feel, fits perfectly. Running really does feel easier, and I somehow feel more in control and able to adapt to the ground. I was a bit wary about the lack of support at first, but have done a few 10 milers without any problems and will probably go longer. Also pleased by the absence of any blisters from day one.
Weaknesses: Pebbles get stuck in the sole, which can be annoying. Also not sure yet how it will fare in wet and icy conditions - we will see.
Overall: I initially bought it as an after race shoe and for shorter runs. But it will now probably turn into my main running shoe.