Product review (5 stars): Works well
Worked well, our vent was about 20% blocked, I cleaned mine a bit differently then the directions recommended, since I had air flow, I removed the outside cover and turned on the drier I then pushed the brush in about a foot at  time turning it by hand and pulling it back to allow the lint to pass by. After about 12 feet I had 2 90 degree bends that I could have pushed the brush past but it was easy for me to remove that piece of pipe and clean it. Once I re-assembled everything I turned the dryer on again and ran it thru with the drill to get everything clean and around the 1st corner. A few recommendations if its really clogged, take it slow don't jam the lint creating a plug and possibly braking your brush, this could result in costly and time consuming repairs. The tape on the shaft connections is incase you need to reverse your drill, I don't recommend it if at all possible, if you do spin the shaft apart and cant reach it from the opening, you will need to disassemble the pipe. Use a lower speed on your drill, if you hit a sharp edge it will easily cut the plastic shaft. On corners keep it moving, after you make it around the corner, pull it out to see if its cut before continuing. With minimal care it should last along time. A shop Vac used as a blower will also work if you have your dryer removed.