I have used this headset for a long time. Plantronics is the only brand I buy for my cordless phone and my cell phone (bluetooth enabled). This one, I liked so well, I bought one for my mom. It's very comfortable to wear, and I have had the microphone flipped up to where it was over my head, and the person on the other end of the phone line could still hear me. I have never gotten a complaint about the person not being able to hear me while I was using this properly, but I have always tweaked the switches before making a call. The only reason I'm buying a replacement is because the other was broken because my husband forgot he had it plugged into his cell phone and the cord got caught while he was getting out of the car. Maybe I should get him one too while I'm at it. Excellent product! Very eager to get this new one.