Product review (4 stars): the cleaning operation was easy and it did a good job clearing 99% of ...
This worked well. My only issue was getting the vac hose attachment onto my existing vent pipe. Somehow it was an odd size (although home built in 2007), so it would not fit inside or outside dryer vent pipe. Ended up cutting slits in attachment to allow it to compress into a smaller circumference. Once I had it inserted into dryer vent pipe, the cleaning operation was easy and it did a good job clearing 99% of the lint stuck on dryer vent pipe sides.