Product review (3 stars): Good but not the best.
This is O.K. but not as heavy as I would like for it to be.  I found it to be lightweight and not easy to work with when you try to stretch it out to the full 8 foot.  The idea with the ends is good to keep it from getting crushed when you push the dryer back to the wall.  I am using it in the attic after a dryer booster fan but I think I will get something heaver to hold the pipe in place without having to have some type of support.