Product review (5 stars): Works as advertised
It actually worked!  We have a 10-year-old home and are finally replacing our W/D.  to prepare for that we decided to clean the dryer vent - runs 20 ft with a right-hand turn.  We bought the Gardus RLE202 LintEater, followed the directions (CLOCKWISE!) and were pleased with the results.  You can see the results in the photo I've attached.
Tips -
Don't use duct tape to secure the rods together - electrical comes off much easier.
Don't overtighten the duct-head screw - i stripped mine out.
Follow the directions - they are very clear.
(I was not asked to make this review, nor was I rewarded for doing so.  Fake reviews are the scourge of AMZ.)