Product review (5 stars): Easy to use, just follow the instructions to the letter.
I called someone to clean my dryer vent system with an advertised cost $99.  They did not return my telephone call so I decided to do it myself and found the LintEater.  I am an average do it yourselfer.  It took 30 minutes to get my dryer, located in a closet on the first floor of my house, out and everything set up including my Shop Vac.  3 Minutes to use the LintEater in my 12 feet of aluminum duct work using a cordless drill.  The duct work now appears almost as clean as the day the duct work was installed.  It took another 30 minutes to get the dryer back into the closet and reconnected to the vent pipe.  The LintEater is mostly plastic pieces and perhaps fiberglass rods (?) so I believe one has to be gentle using it.  If one is gentle I feel most people will get many years of service out of it.  Follow the directions to the letter and it will be difficult to go wrong.  I highly recommend it to the average or above average do it yourselfer.