The noise canceling feature does a great job of eliminating the outside noise. Die Laufzeit des Akkus hängt wie immer natürlich sehr davon ab, wie laut man Musik hört und in welcher Stufe man ANC nutzt. Only other (minor) grip is that the design of the controls needs to be refined. I get annoyed, want to beat it His words. Para mi son bastante útiles, para las video llamadas, no lo requiero para otra cosa, por lo que no pagaría más de lo que pagué por ellos, menos de $1,000 mxn. Should I be more correct about the thickness? I mean they probably arent good at maths or geography so they would seem pretty thick but. Two have held up great, one broke the first week. Based on the reviews saying it runs a tad narrow I went with the 7M and the fit is perfect. They are featherweights compared to the other sandals, and they really disappear on your feet.