I purchased this device after my wife marveled over it. She lives in a metropolis area and I'm constantly traveling and maybe that has something to do with it. There are times when she's using her headset and I'm not able to tell. I got one after being disappointed with the Motorola 500. The Explorer 320 is considerably more comfortable and definitely remains on the ear while doing normal activities. Like some of the other reviews, there is static if there is any interference between the earpiece and phone. I'm not searching for perfection, I just want a good product.