Product review (5 stars): A great tool!
After 11 years of neglect, my wife complained about our clothes not fully drying.  I cleaned the dryer then focused my attention onto the ducting to the outside.  Since my home has a poorly designed duct which is at least 20+ feet, I purchased the basic Linteater with the 12' extension kit from my local Ace Hardware.  This is a very well designed and constructed unit.  I followed all the instructions, connecting my 1/2hp shop vac to in place of the dryer.  Then I started  reaming the duct from the outside working back inside.  When I finally stopped, I had used over 20Ft of rod and then I noticed there was no longer any air suction.  Then linteater had freed up so much lint that the junction near the dryer had clogged!  After a lot of work, I cleared the blockage and now I have a perfectly clean duct.  My lesson learned is to feed the lint eater in very slowly to allow the lint to be vacuumed up without blocking the duct.  I had collected enough lint to fill a 13 gallon trash bag!  I could not have done it without this tool.  The added bristle brush can also be used to eliminate dust from your refrigerator coils.  A very well designed product!