First impression, blows away all the Beats IEM/earphones imo. Seriously. I wasn't expecting any soundstage on this and it surprised me. Tried closing my eyes and felt like I was on a club with speakers positioned in different areas. It also has an airy feel to it, which makes it not fatiguing to listen to for extended periods. The clarity and details are there, although not as good as $100 and up IEMs. It has a decent treble, and the bass is actually pretty good. Not muddy like the old ones, and you can fairly hear good sub bass in some critical songs. Sibilant on high volumes though. I also listened to it connected to my E11 and this is where it totally shines. It enhanced the details and gave out smooth trebles even on high volumes. It also produced a more tight and punchy bass. The bass leak was controlled as well. Although if isolation is what you're looking for, then look elsewhere. They are highly recommended and they are worth the $30 price tag for a stand alone purchase.