Pas terrible. El procesador, wow es super rápido. EXTRAS: Also comes with a small carry case which I like since these will go in my travel bag often. I was concerned that they would not fit because the description did not state if they fit the X1 but they fit my car fine. Also the silver threads are coming loose, and tops of toes are fuzzing up after 2 days of wearing. My husband absolutely love these headphones because he doesn?t lose them like he loses so many ear buds. Stored a large number of shoes on the shelf and the bench is perfect for putting shoes on or taking them off. Il est bien certes, rapide mais montre ses limites selon le nombre dapplications ouvertes surtout. Its a great improvement comparing my old bluetooth stuff. Loved them so much I bought 2 pair!