Product review (4 stars): Works OK
It can be difficult to make it fit because you may need a pair of tin snips to cut off any surplus (depending on your particular installation). Be careful not to trim off too much (as I did!) or it will leak into the laundry room. I was able to "tape up" my little error and make it work Ok.  Lining it up with the wall vent as you push back the dryer can be a bit of a chore, depending on how much access you have around your dryer. It does allow the dryer to go about two inches closer to the wall than a round vent pipe.