Since I intended using the headphones, so the sport, I can only say that these are the best I ever had. Neither my Sennheiser nor any other that I used previously, sit so stable in the ear without disturbing. Before long, you do not notice it, which is so even after several hours.
These strange wings Bose really contrives that they nevertheless sit absolutely unremarkable very safe in the ear. Hardly anything annoying in sports more than constantly "nachzustopfen" - which does not occur in this Bose.
And what concerns the sound - well, that's always taste and sometimes philosophy question - so I am very happy with it for the music styles that I the sport acoustically zuführe (Hard & Heavy, Dance, Trance, Pop ...).
Very convenient is also the included extension cable, which can be used optionally.
The Reebok / Bose Armtasche I do not use, so I can not say anything, for the price it would have been nice if for transporting the earphones not only those Armtasche would have been included, but perhaps also a normal, small transport case.
From my Bose get but full marks.
