Product review (4 stars): It's a dryer vent
I think this must be one of the most boring products on the planet.  You have a clothes dryer and need it to vent.  You buy a flexible duct which comes with fancy tension clamps.  You install it and the dryer vents.  <sarcasm>Yippee</sarcasm>.  Does a good job, but it is ONLY a dryer vent.  Of course, it was at a good price, and it was easy to install, so Yippee after all!