The E10 are likely to be classified in the category of very good products on the market but, like other products, they are too sensitive to movements of the cable which create noise in the headphones. Optimal positioning of the clip limit this effect and it disappears if the cable is put under a sweater or scarf. Easy in winter but in summer it can be binding. For the rest, the E10 has a very balanced sound with just enough as bass and very comfortable in the ear. The price / quality ratio is very good but I'm still looking for a product that will limit the noise caused by the cable when doing sports.