When setting up, I noticed that the headphones completes non-flush to my ears, despite head circumference of about 58 cm. The ambient noise can be heard still, and he loses his position in jerky movements. Well, this is not crushed or is not too close, you could be challenged on the.
To the sound: this is of course a subjective sensation, but for me the headphones is clear to bass-heavy. And, although I am a fan of bass. It lacks something the heights, the sound effect "mushy" and undifferentiated. A comparison: a Jabra Bluetooth headset (EUR 10 more expensive) and a Logitech G6000 Headphones (about 15 EUR cheaper) both provide significantly better sound. Both units are owned by family members in my house.
Finally, it annoys me that the connection only via a special JBL cable is possible, you can use a normal phone cable when the original cable is broken or lost time.
I think now you can guess why I give a neutral three-star rating. Positive is the cool look and not constricting seat, although it characterized the environment perceives (which is sometimes advantages ...). I currently use the headphones to listen to music on your PC that is going reasonably well.