not perfect, but compared VERY GOOD side (benefits-quality) price /

I like the golden model DELGOFFE Manuel and I agree with its findings 90%.
I just regret manufacture a little lightly, but holding up well for now (I made a black hard shell to protect the dedicated: very large, but very damn good, I put headphones in addition "in -ear wired "in DCQ + cables and mini bluetooth receiver)

It's been over "cheap" a Sennheiser 250 euros, but for 20% of the price, so ... By cons comfort is very good, although the principle of the headphones 'closed' ears a bit heated in the long run (skiing, it's a real advantage: I tested!)
So, I can say that it holds well, even at "high speed"! ..

For me its main fault is the somewhat feeble response curve on midrange and bass too present for my taste.
This imbalance is largely corrected by the equalizer of the iPhone but requires re-set this one every time you change output device (eg Bluetooth speaker ...) where the absence of 5th star.

For me, it is its main flaw, but considering its price, it is a helmet that attracted me most of all my purchases in recent years.
Budget looking for a decent headset and feature filled: go for it!
audio beats have only to divide their prices by 5 or 10 in order to fight ...