" Let me tell you. $600+ for the Aeroblade Edge. Returned second one because it would not latch That seems to be the source of the failure. I have a wide foot, very high arch, normally wear a 6. I bought it to wear to a formal dinner but I dont think I will ever wear this anywhere. Just be sure to roll the tip between your fingers (pinching the foam between the tips of my thumb, forefinger and middle finger works best for me) before placing and hold it there long enough for the foam to re-expand properly. The sole looks like it will last for many miles. It wasnt SUPER easy to put together, especially when going to the second, third and fourth levels. One thing I would recommend is investing in a pressure scale and adjust it to the recommended weight ( mine was 2.