After three months, I have used the BT500 headset about three weeks. After less than two weeks, it stopped charging from the AC adaptor, and was returned to Jabra under their RMA. It came back 10 days later, but after another week or so it blew again, this time getting very hot and with that distinctive burned circuit board smell. I've not had a chance to let Jabra replace it again, and am tempted to just throw it away. Too bad, as the ergonomics are very good, the unit sits solidly but lightly over the ear, and the sounds was good when it worked.