This is my second pair of Saucony running shoes. I received these in the mail yesterday and from the moment I put them on, they felt like walking on a cloud. I ordered these shoes in my normal shoe size - 9W. They fit perfectly, hugging my foot in all the right places. I have a weak ankle, and these provide good stability. I haven't tried them on the treadmill, but look forward to doing so in the near future.