Product review (4 stars): The set up they provide may work just fine, it just seems a bit light to me ...
works well, but seems odd that they just include 4 drywall screws and achors as the only means of bracing.  I screwed in 2x4's to the joists in my attic as supports, and hung the hood with lag bolts and washers.  The set up they provide may work just fine, it just seems a bit light to me for hanging something like this from the ceiling, as its not exactly lightweight