Mark:
I can't speak for Jeff, but I traded for one several years ago and had to send it in immediately because the flame sputtered - they replaced a valve and a spring and it worked well for a while. Then, I got it tangled in some keys in my jacket and bent the burner, which they repaired, and it's been working well since I quit carrying it in the same pocket with my keys.
I have two others that I bought new about 4 years ago, and have never had a problem with either one of them. Some piper a while back recommended using the compressed air for electronics to keep the burner clean... just a quick spray every now and then seems to keep flint debris and other particulate matter from building up and causing clogged burners.