I am impressed! I've had to move to the smallest ear pieces but then the fit, seal and comfort is great. I use USB Audio Player Pro on my android phone and tweak the EQ to boost the higher frequencies and the sound quality is SO good. Wow!. The lower frequencies are good and I don't need to touch them. Of course this suits my taste, i do like a V sound signature. I haven't had them long enough to really test out the battery life. So far so good. Comfort is really good. Locked in my ear and no discomfort, i could wear these for hours. Isolation is very good as well. Looks - looking in the mirror these do not stick out, i can see my outer ear from behind them so they are quite flush. Controls are good, still getting use to them but that goes with anything new. I recommend them, price and sound make these the "buy of my time in isolation"