Human hearing range is about 20hz to 20Khz. The fact that it's range goes down to 8 and up to 25 will not be noticeable to most. Clarity of audio quality is limited by both the output source and the audio signal.
They are very comfortable for headphones, not to mention they have very nice sound quality; The coiled cord can prevent that loud noise that happens when something bumps the cord, as well as preventing it form getting tangled.
Much higher price than standard headphones; A bit bulky, wouldn't rely be able to take them out anywhere; (They're a bit expensive to be taking outside anyway) When compared to a 5 dollar set of headphones playing a compressed recording, the difference is not very notable compared to the price...