On top of the Piston's awesome sound, the build quality and design is top notch. The cable seems very sturdy, but I just wish they didn't switch to rubber cable for the cables that connect to the drivers. The casing of the drivers feel durable and look awesome. Even the packaging was nicely done. I'm just so impressed with these IEMs! I'd post some pics, I'm at my sister's apartment and she just moved in so I have no good places to take any :\
Currently burning them in to see how they change
Oh they change for the better. Oh do they ever change. Smooooooooothness.