Product review (5 stars): Worked great
I bought this to clean out my dryer vent since I don't recall it ever being cleaned. This worked great! I was able to clean out the metal part of the vent and removed a whole shopping bag full of lint. I was not able to clean out the full vent since it is the white plastic tube in the attic. The instructions caution against using the cleaning system on this type of tubing. Also, the vent makes at 90 degree angle in the attic so the brush wasn't able to make that angle so far away. I have a small duplex so this may not be common for most people.