This is an earbud, so the expectations will be low. The tonality is definitely better than the Apple earbuds (not earpods), but not as good as the Yuin PK2 (and likely the PK1). I wouldn't be inclined to review an earbud as-is, but with the magic of parametric EQ, it sounds very hi-fi except for the deep bass, which can't be recovered any way that I know.
http://rockgrotto.proboards.com/thread/11081/fiio-em3-stereo-earbuds-review