Product review (1 stars): Disappointing manufacturing flaws...
Seems to work well at pulling air to the outside, it was a huge pain to install.  Its somewhat quiet but not as quiet as I thought it would be.  I have several issues with it.  First, the location of the holes on the top for the screws will put the screw right in the middle of the seam between the cabinet sides and bottom on a 30 inch cabinet- the precise location you don't want to put a screw.  Second, it was delivered in the box with damage to one corner and the welded seams having separated on both sides (see picture).  Sadly before I realized this, I had already thrown away the packaging so I could return it and ended up installing anyway.  Third, its not 30 wide, its 29.625 wide so you have to carefully center it with .375 gap on both sides then finish with trim (which I haven't done yet).