Brent Butterworth at SoundstageSolo thought they sounded fine with good instrument separation; you can read his review to see the music he liked it with. When he measured it after writing the review, he noted that they measured really weirdly, so he said that even though he liked it a lot, it's something that the prospective buyer should try before putting down cash.

It's very curious, because I've also heard impressions that they sound muddy and dull. I briefly followed the Head-Fi thread, and the opinions there were also very polarized; people either thought it was garbage, or it was quite good.

The professional reviews I've seen said it could go either way based on preference.

Mostly pop and techno, also using it for shows and gaming though.