We've been using our Big Chief (3-4 times a year) for almost 20 years. There's never been a problem, except New Years Eve about 18 years ago (don't try smoking, even in an old shed, when it's -10°C and snowing outside), when we smoked from 8:00am until 3:00am on New Years Day (~20 hours).
When the CT flyer came out the other day, I've been looking at upgrading to one of Bradley's smokers ($300 - $400), until I came across this web site:
http://www.charcoalstore.com/kb/article.php?id=008. Now I'm not so sure. I know, I know, the post was done by the owner/vender of CookShack Smokers, but there is a lot of info here.
Gerry, if you smoke as hard as you fish, this might be worth looking at.
DT