Let me start by saying I wear a 10.5 to 11.0 depending on the shoe / sandal. I purchased 1 pair of the Carina sandals in Pewter, It took a couple of times to wear these to the point of them being totally comfortable. However I will say that I never had any pain from them - it just seemed the perhaps my walking in them felt weird due to the rocker bottom? Now that I am used to them....I LOVE THEM. I have several styles in the Alegria line and keep going back for more. I have never been disappointed in any pair I have purchased. But here's the kicker...how comfortable are they really? I work at a pub type restaurant and always bought VERY expensive shoes / sneakers to tend bar in and the following day, my hips and back would no doubt hurt from running / lifting / stocking coolers. Well, one day I said I'm gonna try wearing my Alegria Carina sandals behind the bar. I have not looked back!! Complete comfort for over 8 hours on my feet. I woke up the next day with no pain...hips, back and legs...check...all good! Several other bartenders have followed in my footsteps with these to work in. Now to find a pair of Alegria's to wear bartending in the winter....New England weather and snow just won't work with my Carina's....but rest assured, I'll find the perfect pair for the winter months too!!