Product review (2 stars): Good product but redesign is problematic.
I have had one of these for 15 years. It worked great. It just now has started to crack at the top (I think though that 15 years is a good life).
I bought a replacement.
Here is my complaint. They have been slightly redesigned and those "slight" changes are problematic: the holes for screws do not match the earlier design! The manufacturer should understand that these may be replacements. And that many dryer vents are passing through a foundationconcrete. I will have to redrill the holes in to concrete and patch the old ones. This could have been easier.