There been some mentioning of these, but not saw a dedicated thread. Now why I mention this for th public unknown brand? Because I love the sound and payed 30 € fro them. I am not a headphone freak and heard less then a lot of you. These are my second IEM only. I have the Sony Mdr 1 A, Audio Technica ATH 7, owned some other before like the Koss porta Pro. So my only experience, were the Fioo 9. They broke down after 7 months. I liked them but the treble was a bit too much and bass was imo, not well integrated. I thought they isolated sound well on plane, not being cancelling phones. As I take my Sony for normal use, I needed new one's for the plane, and IEM is so much easier on plane. By accident I stumbled on a review on a french site. For 30 €, they got a 4/5 star review, many good talk on Amazon too. So I took the jump and ordered them. When I received them I noticed first the good fitting in my ears, much better then Fioo, that irritated fast. I tested them on my Fioo x3 M 2 player. Well they certainly are powerful, but maybe a bit closed sound, bass was present, a midds very good (voices), but treble was lacking taking a fall. But not everything is recorded the same, and I noticed the bass, although well present, became more tight. Resolution is much better, then at first impression. yes treble not stand out for listeners that love forwarded treble, I would not recommend them. But if you listen longer, you do hear little bells and details, it is just not taking your attention and is put in front. If they can sound dull at start, they have a lot going for them. They sound warm, and not agressive, and fatigue is not coming fast. The fast, but not invading bass, is realistic, and does not hang like on my on ear phones, like the Sony A 1. In fact, when I put them on after using these, I found them too heavy and confused in the bass. Like said mids are natural, the best I can say all is well integrated in each other. Comparing to other phones I listen to, is very difficult. Maybe they come close in the warm sound of the Kops port Pro, but Bass is much les heavy and more natural. Guess treble is close, but as the Bass that hits short, and not invade, you could end with also more detail in the end. They are so confortable, you forget they are there. No irritation in ear and they are put in fast, as it is obvious how to wear them. If I am honest to myself, I love them so much, I would have bought a second pair as I leave for a month holiday. Because only concern is there is no detachable cord, if they will hold, there were some complaints about that on Amazon. But I have had very heavy use this week and they held well. Anyway Koss broke down twice, and also FIO, you have guaranty on these too. Noice canceling. I never owned any, because too expensive, and not always good without them. These buds isolate well already. I tried them on my very noisy tractor. Noise is reduced very much, I not have to put them too loud. You hear the tractor noise, but it is not invading, music is in front, like the tractors come from the neighbors. <i will see how they do on plane. Sound signature is close to original, but sound feel more extended, a little more info in higher mids, question of taste. For me best price/quality, I ever tried, hope they last, but understand not everybody cup of tea? I love the warm lush, but fast sound. Like even on difficult music, Madeleine Peyroux albums are already very warm and bass heavy, but here, the bass was tight, her voice clear, and instruments very detailed. Note : On my Samsung Galaxy J 5, they sounded much brighter, which is normal as it is not so musical and warm as the Fiio. Recommended.