Product review (2 stars): My plumber never seen anything like this in southern california
I would probably choose something else, but I already bought and install it. My plumber never seen anything like this in southern california...maybe this only good on snowy state.

Pros :
-Nothing has been done differently for quite some time, only this company design something different then the rest.
-Cap create seal for draft and critters to get inside.

Cons :
- Design have flaws, it bend upwards and have a cap which makes a perfect place for water to went back inside once the dryer is off, creating small water build up. I checked mine this morning and there is some water trapped between the vent and the sheet metal from yesterday use.
- Plastic should be more sturdier, already have crack inside the plastic.
- Hole for screw way too near the corner, should be a bit inward. Plastic crushed on the corner when tighten with power tools.
- The design make humid air hit your exterior wall, not sure will this create issues like mold over time.
- I cant understand how people install it on existing 4 inch pipe, as you want to make sure the the pipe surrounding it tight.