Pros: Clear and fun sound, big soundstage
Cons: The buttons are inconvinient, needs replacement tips, may require a CTIA to OMTP adapter, sounds too bassy without modding.
I have the real version 2.0, not 2.1 (with the clip).
I didn't like the provided tips, used the small Sennheiser tips: http://www.ebay.com/itm/110976313070 - much better.
When I plug the Pistons into Audio-GD NFB-11.32, they sound horrible, unless I pull them back a little.
I resolved this issue by using a CTIA to OMTP adapter that came with Philips SHE3590, which is weird, since none of other headphones need it.
This doesn't happen with FIIO E12.
I hate the buttons placement on the remote - keep pressing wrong buttons.
Initially, the Pistons were too bassy, even after a long burn-in period.
I have modded them, removing the screen protector and the foam inside. To keep the drivers protected, I have used a small thin napkin:
The bass cleaned up, and mids and treble stepped forward from behind a curtain.
Now these sound like a baby RE-262.
Recommended for "audiophile bass-heads".