Everything about this product is great, except for the mute button.Sometimes, it takes 1-3 seconds for the mute button to un-mute.This can get very annoying if you're constantly muting and un-muting yourself, or need to jump into a call immediately.Also, sometimes the mute function intermittently goes on and off automatically for a half second or two.Other than that, the quality is good from a construction standpoint.EDIT#1 - Customer service has been fantastic. They're very quick and responsiveSee full review