I kept checking while I was driving to see if it was moving at all, and it didnt budge. Anyone who says you cant run it off a phone or that it needs hours of burn in is a clown. But I do recommend getting a half size larger. Ill post an update after some usage. 5 so ordered an 8. 5M show wearer, however, experiences will vary by manufacturer. We had 2 adults and 4 kids in my pilot so all our luggage had to go up top or we wouldn?t have made it. So the shoes were either too loose or to tight and changing that was just a production that was very hard to get right and took a long time, every time. Just an FYI, these are very small beads. What I was worried about but its not TRUE.