I would step on the rocks and not feel a thing. I wear a size 9 shoe and when I ordered this product, it noted 9-10 so I felt very comfortable with the size when I ordered it. You can still take it as checked baggage on BA too. That?s the kind of world we live in, and I?d be lying if I said I wasn?t mad about it. Not that I was expecting that, though I did want to mention it specifically. Then I thought about my studio needs. I really love how the button aren?t real bc then my huge boobs can?t pull them open like most button down shirts do on me. I ended up connecting the unit to the cable receiver using the RCA connection cable supplied with the device. The lock also does not wiggle around when riding, either, making for a fairly quiet ride relative to other heavy duty U-locks and mounts. Overall disappointed that i didnt receive the earbuds i ordered but, besides the minor hiccup when i first plugged them, in they function.