Good sound quality, headphones really stay in your ear, bluetooth and microphone functionality work well. Minor points: 1. it'd be better if the light didn't flash continuously while you're wearing them and 2. the woman's voice (tells you what functions you're choosing) is too loud and the English isn't great.
The product itself is fine - good quality, nice colours. However, unlike other reviewers, I found that it is far too big for my 13.3" laptop. It is my fault for expecting it to be ok (since it says 'up to 14") but I just wanted to make others with 13.3" laptops aware of this issue.