I bought this product after various tests I've read on the net. The sound is very good: this serious it right, medium too pronounced for my taste, acute specific and detailed. Nice design, comfortable and lightweight. Bluetooth pairing without difficulty, easy control uap. Noise reduction is effective but too changes the level of sound quality. For someone like me, who made 2 hours by TGV a day, this is a real handicap. Too bad because the sound quality without noise reduction is very good. After one week of testing, I returned it, and I took a Plantronics Backbeat Pro.