The quality and clarity of sound are beautiful, they are small and the soundproofing is simply perfect. From this point of view, it's uncompromising ITE: we hear his own heart beating and it means walking and breathing (like when your ears what we mouth). It's a pretty special feeling, I understand that one can not like it. The friction of the cable agree too, is accustomed to, but it's still annoying.
The small problem: they are not very very strong. Warning eh, it's still good quality, but ... By using them regularly (ie about an hour in the morning, one hour in the evening, come rain, wind or snow) My first pair held two years and the second died in one year and three months.