Pros: sound quality, looks
Cons: build quality
These are pretty nice portables, but not for use on anything but computers and portable players. The S-Logic sound takes a little getting used to until they're burned in, after that they're just fine. They can sound artificial though, and I 'm glad I didn't pay any more for these (they MSRP'd at $100).
They've taken a hit in reviews for build quality, due to the cable connection, I can verify this. However, Ultrasone has 5 YEAR warranty on this product, so I simply sent it back and got repaired with a better connection than I originally received it.
Ultrasone has discontinued this model. If you were looking for an open-back on the ear portable at the time I was, I think this was the pair to get -- now I'm not so sure.