'simply in my opinion pound for pound number 1 running trainer'
Strengths: light-weight,top of the range cushioning and just a very good fit with lovely breathability
Weaknesses: nothing bad to say.
Overall: Been running in these since the 11s,when i fisrt got them it was cause my left knee kept playing up and had to keep having rest periods that i did not want. Since ive been using them about 3 years have not had one problem with my knee and dont get any niggly problems. Did the london marathon in the 12s and some 15 mile cross country races aswell and it was a smooth ride along the way.I bought the 13s last year after the marathon when my 12s had served there purpose and they just seem to be getting better and better,i do between 30-45 miles a week in them and have done a few races this year and they are my dream running trainer and would never change them for anything else.