Product review (5 stars): Works great, even if only from the outside
Due to our setup, pulling the dryer out isn't desirable.  As we live in Florida along the coast, we have roof vents with extreme angles to keep driving wind and rain out.  This bends well enough to slowly feed in and out to clean from the roof vent with it's harsh angle to the dryer.  We turn on the dryer and start feeding the lint eater from the roof .. it takes 10 segments to make it to the bottom but it gets a lot of stuck lint out of the dryer vent.  The last thing we want is a fire, so for us doing a dryer vent cleaning every 6 months or so is a very smart and fairly simple insurance policy.  Note that you need to be careful to not turn the lint eater too fast or you can twist the nylon off of the metal fitting .. been there, done that.  I contacted the company who said they'd replace the broken section but they never sent one, so the customer service wasn't very good.  Also note that the metal fittings can be kind of hard to separate, so taking a couple pair of pliers with you up on the roof when you go up will help to ensure you only have to climb up there once.  Recommendation: you may need extra lengths (either to reach the entire run or if one gets damaged) so get those when you purchase the main kit.  This is a simple no brainer .. save your family and your home from a possible fire by purchasing one of these kits AND using it at least once a year if not twice a year.  Highly recommended.