Product review (4 stars): It Works.
It works well, although it could have used a few more rods. My laundry room is more than 12 feet away from the outside wall so about 6 feet didn't get cleaned. I would also suggest turning on the dryer AFTER you are not right in front of the vent to blow out the rest of the dust that this tool loosens but doesn't bring out. I ended up cleaning my deck twice because I hadn't thought of this. Lastly, put a small piece of duct tape on each piece as you work your way in so you don't risk losing it inside the vent tube. I would buy it again but do wish they offered a package with more rods.