I think these have a pretty serious design flaw. The buds are so heavy, they always fall out of my ear. In the end I returned them because my unit stopped charging. I had used them on a couple of flights. The annoying thing was that I would be listening to something and drifting off to sleep, then the earbuds would fall out.

These are by far the best in-ear noise cancelling headphones I've come across. They are comfortable, are very effective at excluding background sounds, and do a great job of cancelling out the sounds in planes (where I use them the most) and cars. Plus, they have good sound quality, and a long-lasting rechargeable battery. They come with a small soft case that easily slips into a pocket. Highly recommended

I have been using these earphones for over a month now. So far they have been great! Amazing quality audio and sound cancellation. However, the sound cancelling doesn't work properly when travelling on vehicles with high turbulence (e.g. Buses), as this affects the mics. on the sides of the earbuds, thus affecting the cancellation. This distorts the audio and can make it quite unpleasant to listen to. Although overall, apart from Buses, everywhere else the cancellation is great and works perfectly. Great Earphones, highly recommended!