Product review (5 stars): Works Well!
My venting starts with a 90 degree elbow and goes about 20 feet up to the roof. I bought this and the extension kit and was shocked when I looked at the pile of lint that was in my shop vac when I finished! I did get one snarl that I had to use the Blockage Removal tool on, but that was because I was trying to blow everything out the top and I clogged the vent. Once I started sucking it down into the house, it was no problem. I even pretzel-ed on of the rods and was shocked it didn't break!

Now if I can only remember to use it every six months rather than every 8 years!