Brilliant Sound Quality for such small headphones. The bass is really clear and loud. There are very few bad points apart from the cable. I took mine apart because it broke after it got knocked. THESE CABLES WILL NOT LAST LONG!!!!!!!!!!!!!!!! The thickness of them is so incredibly thin and fragile. I wired some other cables into the headphones and the problem was solved. However this means that they are no longer fully water proof so I won't be going swimming in them soon. The twist to fit design is genius and fits well as long as your ears aren't mutated. There are three sizes of clip ons so it fits most people. I bought the headphones as soon as they came out.