Product review (5 stars): A must have.  Works great, easy to install
I installed a dryer vent closure approx 5 years ago and was mostly happy with it.  I didn't like that it was off-white in color and the floating thingy wasn't perfectly round, so it didn't float as well as it could have.  We had some gutter work done recently and something was dropped that broke the dryer vent beyond simple repair.

I was so happy to find this new Lambro dryer vent closure!  Basically the same design as our old one.  The color is a nice bright white and the floting part was perfectly round, so it floats better than our old one.  Perfect fit the first time and easy to install.  Definitely helps to keep bugs and critters out and nice tight seal prevents the cold air from coming in.