Product review (4 stars): Easy to use and well thought out kit
I found the included accessories very useful and they fitted well into the ends of my dryer ducts.  The vacuum accessory's spout fit well into the hose of my shop vac.  The various pieces also fit together securely.

This was my first time to cleaning dryer ducts, so I ordered this kit after reading the reviews.  The only thing I wish the instructions had included were additional equipment and materials needed such as:  A shop vac, an electric drill that accepts 3/8 inch bits, electrical tape for securing the screw joints between the rods.  I also found 2 pairs of pliers useful for separating the rods during a session.

I also wish the instructions had warned me about the rods twisting in loops if their length is outside of the dryer duct.  But a simple hand hold to secure the rod and keep it from bending and twisting solved that problem.

The electrical tape was prescribed in the instructions, but when I came to actually use the rods, it wasn't really necessary as the rods are threaded to tighten in the direction that the electric drill rotates.  Also, adding electrical tape to each joint as the rods are pushed further in would also mean that the tape would have to be removed as the rods where pulled out.

Other than that, the brush worked its way through the ducts smoothly, and I managed to clean two sets of dryer ducts in about 1.5 hours.