Product review (4 stars): Good if you don't accidentally reverse the drill...
Was working great until I accidentally reversed the drill...  The brush got stuck in the vent about 12 feet in!  I ordered 3x packages of the 12' extensions and will try to push it from the outside to the inside of the house... ahhhh!

I had tried to attach a metal hanger and create several hooks to fish it out with the rods but it kept getting more lint instead of the brush...