At first, folks on the other end complained it sounded tinny and metallic. What improved it was putting on the windscreen--no complaints since then.It's a little bulkier than most headsets, but can be squished into a pocket or bag without harm.Overall, the Shure QSHB4 Headset (I used it with a Nokia cell phone) performs well, once you've got the right sized earpiece, and several are supplied.