As a musician/audiophile, I'm really happy with the quality of these earbuds. Quality of audio comes out with no frequency difference (if there is, then really slightly). Everything sounds exactly as it is. The only first thing that I noticed and think these do is that they make transients pop out more... but now after using them for over 24h, I got used to it and can't notice that anymore. Also, buttons seems to be hard to press because they don't click and its hard to get some function to work since the sensitive area is small. But other than that, clearly amazing earbuds when I'm on-the-go. Also they are really loud. On iphone with 16 bars of volume, they are already really loud after 6/7 which is good when I you want that extra volume boost at some point because I doubt anyone uses them on full volume. As a fan of KZ ZS6, these are great alternative with Bluetooth feature. They are really comfortable too (which I doubted previously)