Product review (4 stars): Vented or Unvented?
You get what you pay for. This is a good quality (as long as it is vented), high volume hood that is relatively quiet. IF YOU USE IT UNVENTED - AIR LEAKS AROUND THE FILTER (according to Consumers Reports - this is why they downgraded it).

Ours is vented and we are very happy with it. It is reasonably quiet and it sucks good.

5 stars if you are willing to pay the premium for a good VENTED hood.

1 star if you are looking for a good UNVENTED hood.

It is not cheap (I would give it 5 stars for the "vented" review if it were more reasonably priced).