Strengths: same good build quality, and excellent support for overpronator.
Weaknesses: appears to have a higher instep than it's predecessor, the Grid Omni 4. Though I had absolutely no problems with GO4, I notice the higher instep on this new model, and this led to some discomfort, especially after a longer run (Berlin Marathon Sept 06)
Overall: Beware of this shoe if you have a low instep - it will cause you pain! Oherwise, a well build and supportive shoe