I bought these SOL Republic Amps HD to replace a pair of Sony in-ears that I loved so much and used for at least 5 years (different pairs obviously). These are easily 5 times better than the Sonys. SOL is a brand trusted by some of the best artists (Deadmau5, Steve Aoki, Calvin Harris, and the godfather of hip hop DJ'ing - Grandmaster Flash), and you can tell that they put the same care into their in-ear drivers as they do with their higher-end over-ear headphones. The Amps HD come with their i6 drivers (the regular Amps come with the i4 drivers), their highest quality in-ear drivers. Add in a tangle-free cable (which so far is actually living up to that billing), 3-button mic/music/device compatibility and control, a 1-year warranty, AND FREE REPLACEMENT EAR TIPS FOR LIFE, these are definitely the best in-ear headphones for the money. I will definitely be looking into purchasing more SOL Republic products in the future.