Battery life is also as good as the manufacturer claims, which is suprising given the small profile/weight of the battery. Unfortunately, I ordered them in pretty pink, so my son wont want to use them. The sound is absolutely incredible, even without the 7. This was very easy to hang with this large 3M Command sticky nail. They get an A for that as well. Also easy to slip on and off with no hands. Im usually pretty rough on my sandals, they go everywhere with me from walking down streets to the beach and even on casual hikes. Aunque el precio es bastante más caro que otras sillas, merece la pena por el dispositivo de desmontado si hay que usar la bicicleta indistintamente con y sin sillita de bebé. The reason Im on my third pair is I keep banging into things at work and eventually you just get unlucky. One other thing to note, these are more of a slip on shoe.