I was addicted when I heard it from a audiophile show in Hong Kong, the sound was completely different with other headphones. It sounds gorgeous, easy, natural, same as the approach of high end audiophile equipment. It is pricey, although not the highest in market nowadays. But it worth every cent you paid, if you have a set of good equipment to pair with it.
Many people complained its sound like lack of weight in bass, but my experience is due to not yet burnt in and the balance of whole the system.
It took me around 12 months to burn in. Therefore, if anyone wants to go for it, you need to have sufficient knowledge, experience, suitable equipment and patience.