Most of the helmet: It holds well on the head, the headphones very well surround the ears, plastic air bill still solid for the price (and then to 15 euros helmets not strong I've seen!). Let the sound, and the highs are crystal controlled, the bass is very good without omnipresent beings or absent. The sound is not the greatest but good for 15euro do not ask either perfection.
The least of the helmet: The wire 2 meters which is definitely too long to transport the headphones, the sound is not big enough and sound insulation is only partial!
Conclusion: A very good headphones for its price, the most beautiful sounds, good support on the head and all for 15 euros.