I used these everyday for almost a year, until I lost them. They're the best IEMs I've heard, but they are far from perfect. The most glaring issues are the fit, and the lack of bass. Once fitted properly, and using the right tips, isolation is incredible. I've almost been hit by cars multiple times walking around with these in. Again, once fitted properly, the bass is very high quality, but there just isn't enough of it to listen to hip-hop, or EDM. The mids are very uncolored an clear. The treble takes center stage, as it's as clear as I've heard...