I have them, but 2 things:
1. You need a headphone amp to drive them properly. I have a Xonar Essence STX for the purpose.
2. As mentioned, the bass sounds disappointing in their stock state. However, there is a simple mod you can do to fix this (if you don't mind taking them apart). Read
this thread for more. I would recommend going through the whole thing as a number of people chime in with their experiences and recommendations.
While it may seem a bit intimidating, it's relatively straightforward plus it makes a MASSIVE amount of difference. I was ready to send them back before I modded mine.