Product review (5 stars): Just don't sit on it.
I had a strange run to vent my stackable dryer out where a non-stackable dryer would normally sit.  Anyway, the item worked great as you would expect, until an 18 month old boy followed someone into the laundry room and thought it would be a nice place to sit.  The pipe doesn't "unsquish" very well.  Too bad.  It's now become a 6 foot extension with a traditional dryer vent attached there, so all isn't lost.

Summary:  Good dryer vent.  Horrible chair.