This headset does take a little getting use to. When I took it out of the packaging and inserted it in my ear, after a short while the boom would fall down. I was ready to return it without giving it a chance and I'm glad I didn't return it now! The trick I found for keeping the mic boom in place is to have the wire pass behind my ear. This way the wire supports the mic boom from falling down. I can move around and work for over an hour without it falling down this way. The bad side is that the ear piece gets full of ear wax and your inner ear feels a little itchy if you wear it for a long time.What I do like with this headset is that there's no ear clip and it works well with sunglasses. When I'm not using the headset, it's tucked in my shirt. As far as sound quality goes, I get a slight hissing sound in the background. I think it's my mini-usb adaptor that's causing the problem as the reviews for the adapter have similar complaints. On the up side, I can hear loud and clear and even have to turn my phone volume way down. On the other end, I'm heard clearly too. People don't ask me to speak up and I tested it while grinding coffee. My friend couldn't tell I was grinding coffee while talking to him! I can also talk in my workvan clearly. It gets loud in my van above 50 miles per hour.The major flaw with this headset is that it doesn't have a connect/disconnect button on it. It's not practical if you are driving, trying to put the earpiece on and have to reach in your pocket and fiddle with the phone!To sum up:Pros:-Great sound incoming and outgoing-Noise cancellation really works!-No ear clip-Works with glasses-Can wear for over an hour while working-Can be placed in ear quicklyCons:-Takes some getting used to-Ear wax builds up on earpiece and needs frequent cleaning-No connect/disconnect button!