The metal clip is stable and looks very durable. The clip of the MW600 was the breaking point, which broke after about half years, which is why I had to reorder MW600 twice (because the best value for money) to me.
The usability is something familiarization better than the MW600 - all functions have buttons with tactile feedback (quieter, louder, Play (Pause / call, backward, forward, stop) This is one of the fiddly volume control of the touch slider to the past..
The supplied headphones (I like in-ear) are perfect in the price range for me. Along with the Samsung S5 and Poweramps Equalizer many musical styles can (for me Pop, Alternative, Classic) are super implemented. The bass is full, the maximum volume may be extremely regulated.
The connection to the S5 via NFC works perfectly. Short Range hold, headset ear and PowerAmp dudelt automatically (if set) going on.
The voice quality was so far not criticized at the opposite side even when making calls on the bicycle at about 20 km / h scarf before mouth.
My feeling (I have not measured) is the battery power weaker than the MW600, but do so five days, morning and evening added one hour with a charge.