After testing these headphones I was surprised by the sound quality of the headphones considering the price. The sounds quality was crisp and clear when set to an medium- high level volume, but when you turn the volume up it gets very loud but you slightly loose a bit of quality. Also I tested them in different environments like on a busy street and on the train and it seems to cancel out outside noise well but to completely eliminate outside noise you would need to turn up the volume slightly and ensure they are firmly placed in your ears.
Overall the quality is first-class when you consider the price I would image if you got the more expensive model, you would get much better quality. So I would highly recommend it if you looking for a cheap pair of headphone were you get reasonable good quality.