Product review (5 stars): Works Great!
This is a great product, well made and addresses the different issues that can come up when trying to clean your vent. I could not attach it to my old electric drill, I might invest in a new one that happens to work with this kit.  Anyhow I just slowly used the brush as directed slowly adding extensions taped with electrical tape so they would not come apart.  Pushing it down our roof top dryer vent opening which was 30 years worth of clogged up lint!  It was scary full, and we where lucky not to have a fire due to this neglect on our part of this essential maintenance step for our home.  I then went through the bottom opening going up to meet the area we where able to clean out from the top and got tons of compacted dryer refuse by pushing the brush up slowly and pulling out the lint etc. over and over.  Its 85% better  and with the drill attachment it will be even better since it will rotate it super clean.  I highly recommend this product.  Be patient and keep at it the dryer works 100% more efficiently and that is the good new also.