Product review (5 stars): Great tool!
This gadget works exactly as described.  It is well thought out and simple to use.  Allowed my to hookup my shop vac and clean my vent in 30 minutes.

My one suggested improvement would be to make the standard pack come with 15 or 18 feet of rods standard.  12 feet is a bit short if you have any typical length of vent run (typical for my areas at least.  I know there is an extension kit available, but that would be longer than I needed.  Though I might pick it up for next time.  This time I just went from the inside once and from the roof once.  Since I did not want to buy the extension and not be happy with the unit.

I have tried other "dryer vent cleaning kits" and always found them to be junk.  This one is well design and well built.  Even if you bought the extension kit, you would save lots of money over paying for this service.

As a professional inspector I highly recommend that everyone either DIY or pay a professional, but get your dryer vent cleaned annually!!