Product review (4 stars): ... my dryer to the outside vent and this is perfect for keeping it clean
I have a long run from my dryer to the outside vent and this is perfect for keeping it clean.  The vent runs from the dryer down into the basement then across the basement ceiling 16' and then through the wall to a vent cover.  I just pull the vent cover off and run the brush through while my wife vacuums at the dryer connection.  Keeps the duct nice and clean from the lint build-up.