For the cash, very nice headphones. Anyway, compared to the Sony EX71's, the bass is a lot tighter with better extension. The highs are smoother and because the bass is out of the way, vocals are a lot more present and is less fatiguing to listen to in the long run. In respect to durability, I have been using them pretty consistently in the gym and have held up very well. I have now switched over to the V-Moda Vibe, which although is double in price is better overall than the CX300. However with that said, I'd be happy with either the CX300 or the Vibe. Just depends on what I would be willing to spend to plug into my ipod.

These are substancially better than the EP-630, but still they are dreadful comparing to the Philips SHE9500 or the MX500. They offer good bass impact and extension, but its quality leaves much to be desired. It's badly seperated from the mids.

Their highs are decently-detailed and bright.

Overall, they sound artificial and harsh. Despite that, I do use them when I need isolation, they are really good in that respect.