Very sturdy and easy to install. They were my only pair of shoes while my husband and I were in Europe for 3 months this summer! fi5 Pros? No, but the JVCs are not in stuck in the intestines of a dog right now. While the button is nice , Why did this very small button come in an extremely big box? Come on Amazon you can do better. But these shoes make it easy for me. La compra fue con dotomx. Another way of understanding the difference is if you want a closer to the band experience, go with the 599. Best investment ever. I suppose you get what you pay for, but this product still managed to disappoint my ultra low expectations. I?m actually going to order another in a different color.