Product review (5 stars): Buy it, you'll like it!  And have some fun doing it.
This tool was very gratifying to use.  This was one of the best home improvement DIY purchases I have ever made.  I never thought cleaning my dryer vent could be so much fun.  But it was very satisfying to see the amount of lint that this tool removes.  My house is 12 years old and my dryer vent runs about 18 feet.  I normally clean it yearly when I notice that my clothes are still damp after a dryer cycle.  I usually run my shop vac hose down the dryer vent on both sides and it would remove some lint but I was never really sure it it was totally clean because I cannot see all the way down the vent.  Well, when i ran the Linteater down the vent and pulled it out, the amount of lint that came out was shocking.  I never realized how much I was leaving behind.  I was hesitant to make this purchase because of the price, but I am glad I did.  I want to go to my brothers house and use it on his vent, I had so much fun.  I must be getting old.