Weaknesses: BUT they are far to heavy for me, I weigh 145 lbs. ( 10 st. 5lbs.)
Overall: I wore them in the flora london marathon 2006 (although advised not to)o.k. for 8 miles then they affected my ilible tibera band and took me 7 hours to hobble round (that was my eleventh london)I over pronate,and I am 72 years of age, but they are 488 gramms I think??,there has to be a lighter shoe to get me feeling fine to run, and run, and run.