Product review (5 stars): Great Product with great directions
This is one of the few products out there that actually provides directions that are so stupid proof, it is literally impossible to experience failure. The reviews that have stuck brushes and broken rods did not read directions. This product is so simple and so well made, it shouldn't be blamed for user error. It even comes with a DVD just to make sure you don't do something dumb.

The results of a vent cleaning with this product are immediately noticeable. The amount of time to dry a load of towels dropped from ~90 min. to ~45 min. The energy savings will be representative, I expect.

The amount of lint and dog hair that came out of our dryer vent was disgusting. We don't own a dog! Our house was built in 1991 and I expect this was the first dryer vent cleaning.

As stated in the directions: Don't use a standard vacuum with the vent attachment. The directions told me not to, but I did anyway and experienced exactly what the directions said I would: A clogged vacuum hose. Not a big deal, but if you don't have a shop-vac, don't try to rig your house vac. Use one of the many other cleaning options outlined in the directions.

There is also a dryer vent trap cleaning brush included in the box, so you can clean under the dryer, inside the dryer lint trap and your refrigerator coils too. (Directions are included for these operations too).