Product review (3 stars): Loud and it rattles badly.
It looked good when I first installed it, other than a couple of small dents in the lower cover.  GV company was awesome about getting another cover shipped to me ASAP.

Now that its all hooked up the fan is extremely loud and it sound like the damper door inside keeps rattling loudly like it is trying to open and close.

There are three speeds to the fan on the display, but when you change the speed there is no difference in the actual speed of the fan.

I will contact the company again and post more when I have an answer about the speed and rattling.
9/19/13
Still no response from the company about my problems, they responded very quickly at first and repalce the lower cover that was dented.  But now they won't respond to my emails.