Jbl 750btnc is an excellent headset. The mic works just fine although a standard wired earphone you get in phone boxes have better mics. The sound is wonderful, clarity is good, bass and other parameters are good too.

Noise cancellation is the best i have experienced so far. Dual bluetooth connectivity is very good and connecting two device at a time feature is very useful for someone who uses these headphones for work.

Cushion is perfect for the ears. Very comfortable and nor itching inside ears after long calls or listening music for long duration. Only problem i found, is the clamping force is little high making it uncomfortable during initial days.

Sound quality is little better than boat rockers but not excellent. The problem comes in with their connection and quality from the microphone. No noise cancellation.

Review after almost 6 months of use. Just became brittle and flaking. Cushions are not removable.

The sound quality of these headphones is average or below in bluetooth mode. While using bluetooth, the headphone sometimes disconnects on its own and then connects back on. Bluetooth connectivity always breaks like oldage radio.