Product review (5 stars): Simplicity
After spending a couple of hours trying to reconnect the semi flexible duct that had come off the dryer, I finally ordered this.  I had it installed in 10 minutes with a much better seal than the original.  Highly recommended for installation.  I will have to see how it holds up, but I do not anticipate any issues.  I might add that this was much cheaper than the semi-flex stuff.