Product review (5 stars): Worked great
I put this system together as noted in the directions.  I needed the extension kit as I have a long run.  In our 4 yr old home I cleaned out about a grocery bag of lint that was lining the interior of the vent.  It think I spent about an hour from beginning to end to get it all done and cleaned up.  Nice piece of mind that I don't have this as a fire risk in my house.