My ESW9A's that I've had for around six weeks now have really fallen into a special place in my headphone collection. If I'm going portable but don't want to wear IEM's...they have been just the ticket. While they are no where near as detailed and airy as I'm used to with JH-13's or (balanced) Grado RS-1's, they still have a captivating sound with their great mids, sufficient bass and soundstage and laid back organic sound. I love the fullness of sound, which I have not seen replicated in another portable.
It's hard to explain, but it's very easy to find your foot tapping with them, and I've found their comfort level to be spot on. So far very happy with them, and they are a good step up from my Yuin PK-1's and KSC-35's that I used to use for the same purpose.
If the bass was a touch tighter and the detail a touch more, these would compete with any portable headphone I've heard in any price range.