Product review (3 stars): Good price/performance.
For the most part - I'm pleased with the unit.  I've only rated it three stars because of the condition it was in as received and the installation requirements.
Condition as received:
1. Baffle was loose and sliding around in the packing.  Luckily, there wasn't any cosmetic damage done.
2. AFTER installation, when I powered it up to test the unit (per instructions), one fan was totally out of balance and vibrated uncontrollably and the second never turned at all.  The first fan "blade" was actually bent significantly.  Eventually, I was able to get it pretty much bent back into the correct shape and it worked with just a slight wobble.  The second fan worked (the motor was so quiet I didn't know that it was running).  However, the fan blade assembly set screww was missing!  Again, I was able to fix it on my own but not all customers would be able to and would either have to call someone in or return the unit.

Installation:
1. It's a two person affair - at least.  I was able to do it on my own but I definitely wouldn't suggest it.  The unit's too heavy and awkward when trying to position it over the stove.
2. As has been pointed out - the 4, small screws that are intended to hold this unit in place are too small.  They MUST be replaced with more adequate sized screws.
3. To correctly poistion the mounting screws, you'll need to make a template.  You can measure all day long but, when it comes time to mount the unit, you'll still be off a teeny, tiny bit.  I would've knocked off one star just because they didn't include a mounting template.

Operation:
1. Works great and looks great.
2. The light is more than adequate contrary to some of the comments.  They're blue-white LEDs so some people may not like the look but, with one on each side, they light up a 36" cook top very nicely with minimal to no shadows.
3. Fan noise is pretty much as described.  Certainly not the quietest vent hood but, at the lower speeds, not at all intrusive.  I had to use an adapter (stack) to go from the rectangular vent to a round, 7" duct but that wasn't an issue.
4. Automatic power down of the vent is a nice feature and works well.

Overall:
A good unit that performs as expected and as reviewed.  Factor in the cost and I'd recommend this unit.