Product review (3 stars): It's okay.
The good news is that WHEN IT WORKS the fans seem to do a good job, but then there is the bad:  The "30 inch" model is only 29 inches, which leaves a gap if you have a standard size opening.  The lights only have one, bright, setting, and the button controls for the fans are weird - you have to turn it on before you turn it on, and you have to turn it off twice.  What's more, the fans don't stay on at a constant rate.  They are repetiviely reducing the airflow in the middle of a cycle, almost as if a fan isn't working or the power regulator is broken.  If I had it all to do over again, I would spend a few more dollars to get a better one, but it's already installed, so that would suck.  If they tell me it's broken, I'm returning it.