I own several different colors of this version of the Onex shoe and I had them for many years.  As with any rubber product, the rubber sole stiffens over time.  I don't mind this one bit which is why I purchased this pair.  The silver is quite brilliant and I love it.  The only reason that I didn't order a 2nd pair in this order is that they didn't have my size in the platinum.  Some one had told me that these shoes 'wear out' over time but I took a chance and am glad that I did.  Even though my old platinum ones are starting to show some wear and tear, I'm excited to see that Onex is still making this basic style.  I don't know about you, but I just love it when I find an 'excuse' to buy more shoes.  I just love shoes...the more the merrier!!!