I started off with Dave Clark, non-noise cancelling head set and switched to the Lightspeed 20XL. I have had it for about 4 years now, no problems. My only complaint is that it makes you look like Mickey Mouse with those huge ear cups. Several people have commented to me that they have had problems with Lightspeed products, but always receive a quick repair. I have never had any issues with mine.
In November of last year, I bought the Bose X headset and I am really enjoying it. Once you have experienced the ANR headsets, you never go back. I am taking advantage of the 12 monthly payment plan that Bose offers.