So for the moment:
I chose this brand and prior reviews, I'm not disappointed this time.
Comfortable, nice, the sound is very good! And bass too! Cheap!
Very insulator (especially against the crying babies on the train, bus). Finally headphones where tips are super well hung !!!!! Halleluja! No risk of pommer them as I have done 20 times with all my previous headset brands (Philips).
Warning to your eardrums: in-ear earphones if they are too strong are very bad for your eardrums because all the sound in your ears dark unlike helmets and basic headphones.
Voili voilou, good article but I keep you informed. My previous Sennheiser headphones were, as good as these and after one year they died. And my old Philips, after 1 year and a half, one side broke.
A +