Product review (5 stars): Worked great, Was not thinking I really need to do ...
Worked great, Was not thinking I really need to do this, but after we were finished there was more lint than I thought would have come out of the dryer pipe.  The air flow is stronger now after the cleaning.  On suggestion is run the cleaning brush threw more that three times.  I did three and the next time we used the dryer there was a big pile at the vent exit.