I got a set of these today, and boy howdy they're sweet. They really preserve high frequencies, and they fit really tightly in your ears. The designer of these things is a genius. I was listening to some McLusky today (very loud, trebly rock) and I could hear every detail. Then, I tried a Ralph Towner album, 1978's Batik with Miroslav Vitous and Jack DeJohnette, and every nuance of the bass and cymbals was preserved. You can't say that about Hearos! At $10/pair, it's hard to lose. I strongly suggest everyone buy a pair or two of these.