Cheaply made, fell apart, had to return
Some of the rods, even though securely attached to each other, separated while others got stuck and a good deal of force was needed to separate them.  The brush and two rods detached in the vent and had to be extracted through the roof of my house.  Evidently, they detached because the drill was turning in the opposite direction.  This is intuitive after the fact, but there were no directions or label enclosed with the product to at least warn the user about this possibility.  Even so, the fact that the thing would not stay together suggests a cheap knock-off product that caused me more work than necessary to clear out some lint.
Rating: 2 stars