Product review (5 stars): Works great!
The LintEater works as advertised and is reasonably priced.  Cleaning my dryer ducts isn't exactly high on my list of ways to have fun on a Saturday, but it's good to know that my risk of a dryer fire is reduced.  Also my cloths dry faster!

A few things the ads don't tell you...

1. For best results you should have a shop vac or vacuum that blows outward. This blows through your ducts as you do the cleaning.
2. You need a power drill.
3. You need duct tape.