Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Flawed design

I bought one of these in Nov 2008 and was extremely happy with it until Jan 2009 when the mic boom stopped working properly. The boom wouldn't stay stored any more so the unit was always on... The batteries would run out and if we were close to the car we were connected to the BlueAnt. We got a replacement under warranty but in June 2009 the same thing happened to the replacement. I've taken the unit apart and it's a spring and catch arrangement inside that keeps the boom in place. Problem is that the catch is plastic and small, so after a while it wears away and no longer works. It's not replaceable.Shame, because otherwise the BlueAnt is a wonderful device.