Excellent sound quality. Easy to use and to set up. comes with a lead, so it can be plugged in. This is very handy when flying, as the noise cancellation technology works great on a long haul flight. Built in rechargeable battery has good life, comes in a nifty case to protect the headphones. The only downside is that the headphones have to be folded in a certain way to fit in the case, which is a little cumbersome. Otherwise, highly recommended. Got these for 1/2 price in an offer from JB Hi Fi, so excellent value for money. I have a pair of Bose QC15 and these are pretty comparable in sound quality.