Got mine today but didnt have much time yet with them. So far i like them, they sound airy and have a good soundstage for a headphone of that size. The soundstage doesnt extend as much to left and right like open headphones but enough to enjoy it easily (im a soundstage junky).
Soundsignature is kinda neutral with small "fun" tunings here and there: a little bump in bass, but it has less bass than for example a PX100 or L3000. Still not a bassy can, but enough to be happy. It has very enjoyable mids and slightly more treble than the L3000, but it's far from being trebly. Overall it sounds very natural, it has no offending frequency anywhere, and doesnt need much adjusting to it (completely unlike the W5000 for example)
For now I love the bass texture, mids, soundstage (partly). I dont really have the gear to judge it more seriously right now. It could have more impact and a little more airy wider soundstage but that is probably due to using it right out of my crappy stuff (portable cdp, psp, laptop).
The HD25-1 could be a nice addition to this since its completely opposite of the ESW9, little cold signature, slightly metallic (yes, with replacement cable and over hundreds hours of burn in), closed in sound but it can rock a little more. The ESW9 can't convey the grind of a distorted marshall stack that well, however clean to crunchy guitars sound absolutely great on the ESW9. Also pop/electronic music is great on the ESW9 due to soundstage.
Isolation is good enough for me, won't be usefull on an airplane but walking with it should be good. Listening to music with avrg volume makes it very hard to hear close speaking however you register some noises (like caughing).
Looks: Actually they look pretty cool on my head. But i have a small head (grados only fit me on the smallest possible setting). If you're bald and have a big head and you need to extend it much, things turn out very unfavourably similar to the es7.
PeterDLai: The last big headphone i had was the L3000 i got in japan. I dont really have the time to listen to alot of music recently so i couldnt have so much money in a headphone sitting around not being used. Bought a nice Fender for that money instead