Product review (5 stars): Awesome!!!
First off, Nutone and Broan are the same exact company so don't fret about one or the other, they are the same product (I talked to the company).  This hood has the option of venting out to the exterior of the house or re-circulating the air to the interior of the house.  Make sure that you or your electrician knows this; if he misses this easy step you will have BOTH (circ and re-circ).  The step is to simply remove an internal plastic piece and place it back in backwards blocking the re-circulation vents, re-directing the air to the exerior.
The hood comes with a flap door damper which vents, in my case, to the attic.  Positive pressure opens the door for air flow to the attic and when shut off, the door simply closes, thus not allowing cold air to get in during the winter.
The 4 fan speeds are magnificent; low is ultra quiet and high is like a tornado vortex.
As some allude to, you can put halogen lights in there but those are pretty expensive, mine does just fine with 2 x 40W clear bulbs, nice and bright.
There are two stainless steel mesh screen filters; very easy to remove/replace should they need cleaning.