Product review (5 stars): Mixed Product
I purchased the Heartland dryer vent about ten years ago from Home Depot. I never had a problem with the original installation or servicing to clean the lint from the unit. It also closes completely to keep out vermin and air infiltration.

I believe that some people with the bad reviews are rating the wrong product.

It appears there are some copies out there that are not up to the standards of the original Mfg.

My $.02 cents