Product review (4 stars): Great but defective.
It is a good product, easy to follow the instructions. Just connect all the pieces together, disconnect your dryer from the vent and start cleaning that unwanted lint. Only reason I give it 4 stars is because one of the rods threads was stripped so I couls not attach it to the others, depending on the lenght of your duct this would not be a problem. Unfortunately I required to use all 4 pieces but managed to screw the rods using pliers, did not go in smoothly but it got the job done.