Strengths: Extremely reliable and hard-wearing. I have been using this shoe since the Radius 4 and have changed them twice each year. They are remarkably consistant and very reliable in what to expect from its performance.
Weaknesses: A little bit 'bulky'.
Overall: I use orthotics and this shoe was approved by my podiatrist for my particular foot shape. I've used it for four years and will continue with it. It is very reliable and hard-wearing and I really don't have my to say that is negative.