Product review (5 stars): Cleaner and Safer, too.
I used to have to go under my house to remove and clean out dryer ducts, but this allowed me to do it all from up top.  I ended up using 7 rods to run all the way from the dryer to the outside and had no problems.  The adapter letting you use your shop vac and run the rods through worked great (with a little duct tape) and kept down the mess.  I had to run through a couple of tight 90 degree bends and had very little trouble getting through them.  Would recommend this for anyone with long dryer duct runs.  Wife says dryer runs loads quicker now (safer too), so I should be saving on gas costs.