I've had one for 1.5 years, but I have the TSO'd one which doesn't have the adjustment thing. I just mailed it back to the company last week because the rubber coating on the mic was splitting open. They just mailed me back a brand new replacement.
I'm very happy with the product, and now the company has shown that they will stand behind it. Give them a call and I'm sure they'll take care of you- although they are a little slow on the callback sometimes.
Hopefully they are working on an updated model that will hold up a little better in heavy-duty airline use.