These headphones sound great, excecllent for drowning out the drone of the train on a commute, a vast improvement on the 'phones that come with an iPhone. Sound isolation from your environment is good, with little or no transmission of cable noise et...Read morec when it brushes against you. The build quality is also good, they feel sturdy. having broken two pairs of Sennheisers (MM50s and another cheapish pair) in the last year without really trying I suspect these Shure 'phones will last a lot longer. The carry case that comes with the headphones will also help to keep them in good condition, I'm sure.
Overall, a good purchase, perhaps too expensive when they first came out, but now the price has come down, a good buy.