Very nice product just as avertised. If stable, the bluetooth wont cut in and out. I like to wear these types of sandals in the spring and summer while I am outside- these are okay but definitely not as well made as the Puma ones I have. I dont see this boot lasting as long as my classics that ive had for 8 years. In her words, her ?feet feel wet & slimy when I wear them?. I used the hardware provided without incident, but I think this would work fine with other anchors meant to carry weight, too. You can advance and select harder skills as you go. These boxes were one of the few Amazon fails! GOOD. However, I should say the wiring inside is too small.