I just bought these on amazon, but had to return them... I could get them to "seal" in my ear canal, but if I shifted my scalp at all or raised my eyebrows, it would break the seal and ruin the sound... They sounded decent thought.. and I liked the design overall... They have the perfect length cable connecting the earbuds, most companies are too long. Bluetooth worked flawlessly and they are able to be glitch free to around 30 ft probably. I was pretty impressed. But since they don't fit my ear I ordered the X8, we'll see if that's better.