Incredible battery life and it has some weight to the thing! It is so comfortable! Unlike some other harder shell protection, these don?t come off when you take the headphones off of your head. I cant think of anything negative about this board. I have 2 boys so one or the other wears these. Again, designed in the USA but made in China. - The noise cancelling was pretty decent, I am used to a noisy gym, with people talking, working out , a lot of TVs and music on the background. Il est important de bien suivre les instructions et de garder le pinceau bien droit lors de lutilisation. Pienso en comprar el modelo más chico para mi recámara. They?re GREAT!