Ive used it probably a dozen times collectively in the less than year that I have had it. Metal quality is very good, very strong. Ive always used sandals and clogs so I cant talk about shoes or other models of the brand. La relación precio- calidadme parece excelente. Followup review: I exchanged the 9. My sister who’s a 5. I wear a size 8 across the board in all shoe sizes but I got pulled into the comments saying to go a size bigger. Like every brand every style. My foot overpronates and as an overpronater the cushy Crocs were making my knee hurt. Finally I did some Google research and on the Bose site, and this charger isnt compatible with the speaker it is bundled with here.