Product review (5 stars): A great tool!!
This sucker does the job!!  Read the instructions for the most part... contrary to the instructions, the metal rotary cleaner attachment needs to be tightened with a wrench to make sure it actually rotates when the wands are turning... finger tight didn't work well...  once you get it tight, it will eat through very heavy clogs...  it may take more than one pass through to get the heavier lint clogs out, but it did get it done.  I was at the point of buying a new dryer (which wouldn't have solved the problem), and this tool saved the day for us.  Highly Recommend.