Product review (3 stars): Item is acceptable, but kit should come with foil tape!
This item installs quite easily; however, in retrospect, I wish I would have simply bought individual parts.  When I tested this ventilation duct for leaks there were severe leaks at every joint.  Since the kit did not come with foil tape.  I bought some and taped every joint as well as I could, but there are still some leaks near the tension screws.  For the price, you get more than you would buying the items separately.  Overall, I think it serves it's purpose, but I would not go as far as to call it an "installer's kit."