Product review (5 stars): Great kit!  Be sure to order two of you aren't sure about length
It really worked well.  The whole job took probably 20-30 minutes.  I have about a 20 foot vent so I ordered 2 kits and screwed them together.  It was very easy to do and made a huge improvement in the drying time.  The only complaint I have is I wish they sold just an extension kit but that is a minor gripe.