Product review (5 stars): Money Saver
This has saved us so much money. The dryer was taking two or three cycles to dry a load of clothes.  A friend suggested that we try cleaning out the dryer vent since it goes out through the roof.  The total run is more than the 12 feet this product will clean so we started in the house and cleaned the vent as far as the extensions would go.  Then my husband took the drill and the kit to the roof where he fed the brush into the top of the dryer vent while I used the shop vac from the bottom to vacuum the lint he was loosening.  We were able to clean the vent entirely and now our dryer often finishes in less time than it takes to wash the next load of laundry and the clothes are dry every time.  This has been a huge time and money saver since we are running the dryer about 1/2 to 1/3 as much as before.