I have Paperback Edition, v2, and iF commemorative edition. I plan to buy the white/silver v2, because it looks visually nice . The paperback is poor, not recommended to buy for music lover. But the V2, I have to say, it's very impressive. I love this IEM.
My only problem is, the audio is worse when I use it with mi3---than with my other devices. I tried many combinations of setting, music player application, audio mod like viper4android, set up dirac, use OMTP-CTIA adapter ( in case it 'maybe' has different port with the device) etc. With, for example, xperia z, xiaomi piston can produce amazing audio. But with mi3, don't know why, it sounds muddy. Not too muddy, but less clean than xperia z , or even with my old dell streak and optimus 2x. And it getting even worse when I turn on Dirac mode that is provided in miui.
Maybe it because driver, codec or something? I think miui team have to give more concern about audio quality too
Sent from my MI 3W