Product review (5 stars): Great product. Follow the tips posted in the comments.
This thing was effective and easy to use. I have a long run. 12' vertical and 25' horizontal. Bought two kits. Use drill on low speed- I tried high but low seemed to push the lint better. Only rotated clockwise. You also need to make sure the head comes out the end of the pipe. I ran multiple times from both ends. Took about 45 minutes and pipe was lint free. Great product.