Product review (3 stars): Does help clean dryer ducts but be careful when working with this kit
This Cleaning kit did not work as well as I had hoped, fibers from the brush got stuck in the sections where my vent ducting connect, mine is a straight run about 28ft, so you have to clean from both sides.  Fortunately I was able to push it forward while spinning my drill to free it up after a few min.  I was afraid the rods would break during the process as they were too flexible for my application being a straight run.  It would have been a mess if the brush was stuck 12 feet in since it was jammed good, even my fiber pull rods wouldn't be able to clear that out.  Not all of the material came out and some of the derbies was really stubborn although I will say for shorter dryer duct runs this tool would be good.  For bends and longer runs be very careful or you could have a bad situation.  You can't just reverse the drill to unjam or you risk un-threading the rod sections.  I would like the rods to have some locking mechanism once they connect for this reason and to have an option for firmer rods for straight runs, even with just two sections the rods bend considerably, I was worried the whole time the section were going to break so I worked very slow and cautiously.  On a bright note it does get a lot of lint out of your ducts.  The construction could be better.