Very good sound quality and very convenient in the ear. I have worn them for 2-3 hours continuously and they don't bother me at all. However, they don't have enough volume and they don't fit completely on the head (at least on mine, maybe they fit better on someone else's head :P), so the sound is not isolated at all and it's not so loud until you can enjoy the sound well. If you push them in a little, the volume is much better, but it's difficult to sit and hold them for hours in order for them to fit and isolate the sound a bit, so only if you come up with a trick for them to stay in place. After years of having them, the plastic started to come off from the headphones because the ear sweats a lot with prolonged use, and now they are just sponges underneath, but I can say that it's better this way.