Product review (5 stars): I absolutely love this kit
I absolutely love this kit. The company really put a lot of thought into the product as well as the documentation for it.  It worked flawlessly for me and resulted in a clean dryer vent that actually allows our dryer to work again.  And our vent isn't a simple duct through an outside wall.  It's at least 15 feet long with a couple bends in it.  I was able to use the tool first from the outside, then the inside, and cover the whole length without any issues.  I can't recommend this enough.