Product review (5 stars): I keep getting this ducting
I'm very hard on stuff like this, but this ducting is very useful, strong and quite workable.  I prefer this type over the Aluminum ducting because it holds it shape much better therefore improving flow.  The slightest bend in the Aluminum ducting reduces flow, this ducting does not perterbate.  Decent product.  NOW, I'm forced to wonder if the price will go up since I wrote a nice review.  Anyone ever notice how that happens a lot on Amazon?  Or, if you write a bad review (being honest), the item is pulled and re-listed to remove the bad reviews.  This behavior taints all reviews, be careful.