I've had a pair for about a month now. I'd liken their sound quality to an in-ear Grado, better than an SR60 (better spectral balance and wider, deeper soundstage), but not as good as an SR225 (for one thing, not as clear or well-focused, but the d-jays ARE nicely detailed). I particularly enjoy them with rock at work, where I can't have sound leakage. For genres of music other than lively rock, I use the Ety ER4S, which deliver considerably better sound quality across the board, but not the crunch and chunk factor of the d-jays for rock, particularly rock guitar.