I'm on my third, a 903 and 903+ two (almost identical). There are frequent software concerns, the headset does not respond to the buttons (pause music, off), you can not turn off or reset it, you should let it gently offload or wait (1 day) snaps to off himself. Then it goes again! My first (903) had this app problem, but not adjustable, return, replaced by a 903+ (which works except temporary bugs). My second 903+ purchased meantime (I can not live without music or rolling bike), has just let go this time for a problem "hardware": over charging, it flashes red and the battery becomes hot in 5 minutes. Fed up!
Big worry Software on a first 903, then on a 903+ exchanged for a faulty battery, but the last copy work correctly for 1 year about. Traces of corrosion (I wear biking and sweats a lot) begin to appear, but I would say that this is normal given the conditions. No software concern (it depends a lot on mobile with which it is used) with my Samsung Galaxy Note (1).
