I'm not sure if the ones I tried were defective, but I went through two pairs trying to fit a comfortable fit.
I've worn Saucony grid series for several years now, and liked them all, but I could not get comfortable in these.
I ordered the same size that I've always worn in Saucony, but both right shoes seemed to have an issue with the footbed.
There was a definite ridge under the ball of my foot which was uncomfortable and also seemed to make the shoes fit too tightly.
I ended up buying a different brand.