Product review (4 stars): Does the job well
So I needed a more flexible solution to the more standard hard metal expanding dryer duct.  This worked great.  The clamps are a little small and the metal cut ends jut out so when you squeeze them, they cut into your hand.  But I did not buy it for that.

The material is delicate, but not so delicate as I have used in the past.  It did not rip or tare or puncture when installing.  In fact, because it was more flexible, it did not get ruined like the hard expanding ones I have used in the past.