The upper material isnt as nice, the sole isnt as wide, feels different, and they leave black scuffs on some of my floors. This is a great alternative and Im ordering another! This is on me I guess. Couldnt tell any difference from the original m50x pads. Las sandalias son de verdad muy lindas y por eso les doy 5 estrellas, los colores vibrantes y de buena calidad, además de que son mi cómodas, lamentablemente a mi no me calzaron ya que tengo el pie muy delgado, el número 8 me quedo muy flojo y el número 7 me quedo justo. They say the phone is "South Korea Open" which is restricted to Asian regions, so definitely not internationally unlocked. Love the appearance. A medium would have fit perfectly. These are high heels in the best sense of the word they are a good high height. It is not a problem but you will have to work it a little till you get the feel of when to push and when to pull.