Product review (5 stars): Worth every penny!  Reduce fire hazards!
This tool is worth every penny. Our 14 year old dryer was taking two cycles to dry a load. I cleaned the vent pipe which was about 25 feet long and was amazed at what came out. After cleaning the dryer now dries like brand new.  Very easy to use. I did have to purchase some extra extension rods for my long reach but worked with no problems even on long pipes.