Strengths: They are well cushioned, particularly for me, being of a 'bigger' build than most runners and with two dodgy knees, I have managed 25 miles + per week with out injury. Just putting them on makes me feel good & want to run! (How sad is that!)
Weaknesses: Because they are so 'soft', the soles wear out quite quickly. Also not the cheapest shoe on the market.
Overall: Just bought my second pair - can't say more than that!