Product review (5 stars): it is pretty awesome. so far I seasoned a carbon steel ...
First installation was a bit of a pain.  Make sure you wear gloves or risk be cut by stainless steel.

First mark your left and right fan.... Or you will have to guess / deduct which one goes on what side.  There are no markings and fans are not the same.

If fans are not properly installed it will blow air instead of sucking it.

What made it more manageable for me is realization that there are 2 holes on the back of the unit.  I basically first secured the unit to the wall using these holes and then secured the unit to the over the range cabinet.

As far as performance, it is pretty awesome.  so far
I seasoned a carbon steel pan by Uber burning potato skins and had no alarms go off....

This unit replaced GE over-the-range microwave that used to send my house into an alarming disarray every time I made steak.