If you have a ratchet driver with Allen screw heads, your fingers will thank you. - The new HERO sensor is fantastic. Ne faccio un uso intensivo in estate, le utilizzo dalla mattina alla sera, per brevi e lunghi percorsi e per andare al mare e non ho mai avuto problemi ai piedi, per cui mi sento di consigliare sia il modello che il marchio in generale. The sonys on the other hand sounded much better at all levels and gave a richer and fuller sound experience. Some said order down. Its hard to put into words how much better they are but lets just class them as the next level up. Wore these straight out of the box and actually slept with them on. I was a bit disappointed. Mine are still functioning, and with the original cord. works with my bose QC 35 II as well (make sure you select the right version on the page - 2.