These head phones are pretty much awesome. The sound quality, for such a small set, is actually quite decent. While I typically am not a fan of on-the-ear phones, these are quite comfortable and never give me any ear wear trouble.My primary use for these is listening music (via phone or computer), and they are great for that. They sync easily and have a really decent battery life (3 days at about 2-3 hours a day use). The few times I've used if them with my phone for calls, the volume and clarity of the mic was reported to be acceptable by the people on the other end.The only down sides to these headphones are twofold:1) Construction Quality: If you sit on these, kiss them goodbye. They are lightweight and they just don't feel like they'd stand up to much of a beating. That said, just be careful with 'em.2) BLINKING FREAKING LIGHT: This is the biggest "bad" thing about these headphones. On the right ear, the circle around the controls lights up blue or red as a user interface clue (ie: when turned on it will blink read 1, 2, or 3 times to indicate battery level.) However, when just on and in listen mode, it flashes this horrifically bright blue -- I wouldn't wear them on the train for fear of blinding everyone on my right side! There is a solution, however: a few expert dabs of black paint (a sharpie didn't work :/) and the blink is reduced to nearly gone. Leave a space open for it so you can still see the "UI" elements, but it covers most of it.Overall the headphones have quality sound, are easy to setup, and a joy to use. If they were over-the-ear and didn't have the ridiculous flashing light, these would be a 5.