Product review (5 stars): AMAZING!
I am amazed at how filthy my vent was! I mean look at my picture!!! My vent has 2/3 90 bends right at the end by the dryer and this worked great! I hooked it up to the drill and got a bunch out, then had my wife start the dryer to help push put the rest while I used the drill again and even more lint came out!
My house is only 12 years old if that helps anyone.