1.) The earbuds do not fit properly, at least for my ears, trying all three sizes. I have to take the middle, the big ones are too big and the small fall through my ear canal. Nevertheless, the average hold just not strong enough, and loosen up quickly with little head movement. Is perhaps because they are a little too short, you can not bring deep enough and therefore does not produce enough friction.
2.) The cables are about three times as thick as that of my other Nokia headset. It may be more stable, but also stubborn. The cables are therefore less flexible and easy to twist or move earplugs and at the slightest head movement intensified the whole thing until those things then fall out.
3.) The clip on the "remote" does not imply the sausage on bread. Thus, the control unit falls in activities sometimes and pulls at the opportunity equal to the shorter earplugs out.
4.) The cable between the remote control and the shorter stud earrings is too short (28,5cm). You have to attach higher amounting middle chest or so that the cable still has a bit of air the FB. This is clearly too high - when attaching the clips or the draufschauen one must soon craning her head down. In addition, this position for fixing is very limited.
5.) If the earbuds do not sit accurately, then changed the perceived sound, one hears, for example, more bass and less treble, or vice versa.
Conclusion: All the points mentioned cause the headset does not sit well. This one hears bad or uneven. The shorter Studs fans constantly and must be prevented from fall out permanently.