With iPhone 5, Siri functionality is excellent: use the third icon on the right (voice command) and you can have access to everything and do everything that is remarkable and it largely compensates for the limitations announced at the expense of the Apple's iOS. The music also works well via the icon in the voice command. The battery holds in standby but it consumes more intensive use. If the watch is too massive to the wrist, it is possible to separate the bracelet and put it in a small pocket or hang (foreseen). For 90 or so, the price / quality ratio I think is appropriate