Product review (5 stars): Easy to use and very effective
Outstanding!  I have a very long vent run with many turns from the dryer to the outside of the house .  I used all 12 feet of pole from the dryer side and the outside vent, giving me a total coverage of at least 20 feet of conduit.  I wish I measured how much lint I removed - it must have been at least 3 gallons in volume!  After finishing by blasting air from a shop vac through the vent, I went from having almost completely clogged conduit to complete free-flow.