Pros: great bass, excellent highs, very stylish, built like a tank
Cons: price, availability in USA
These earphones are an excellent pair for any music that requires solid bass plus good high end. Electronica, dance, and jazz sound really good with these.
They have dynamic and balanced armature (BA) hybrid dual drivers, giving you the best of both worlds.
This is from Clio's review, and I couldn't say it better:
bright and aggressive IEM (like Brainwavz B2, Fischer Audio DBA-02, or EXS X20) with a lot of bass. Treble is crisp, sparkly and extended, maybe a bit aggressive as well, but milder than X20 while still bright and analytical. Mid is a dip in the whole presentation, lacks warmness or sweetness for good vocal. Bass, though not quite as deep and textured as the best bass monster, is still commendable for overall good quantity and quality. It is slightly on the boomy side, but it remains clean and doesn’t flush out the mid. Soundstage is specious and very much opened. The only downside is that it doesn’t quite have the depth to match its width.
As for cons, they are pricey, especially if you have to order from the UK. When I wrote this they were not available in the US.
If you can afford them, and are looking for something different, then these are highly recommended.