Product review (4 stars): Great unit, quiet at low speeds, really moves the air.
This hood really moves some air.  I didn't find installation of the device itself to be particularly troublesome, though there were some spots that weren't overly compatible with my cabinets (that's no fault of the manufacturer, just something I should have measured) and the ductwork was troublesome to install (again, that's on me and my house).  Once installed, the thing is nicely quiet at low speeds while still moving a decent amount of air, and really clears things out at high speeds while still being quieter than even the low speed of the old microwave "vent fan" that just pushed air around the kitchen.

The hood itself is great for the most part, but there are a few things about it I didn't like so much that I docked it a star:

- The buttons don't always respond to a quick press even when it "clicks", which is infuriating when you're frantically turning the fan up in the kitchen after you've forgotten to turn it on and set off the smoke alarm.
- The relays are kind of noisy (this is, obviously, a bit of a nitpick).
- The recessed bulbs (MR16 GU10 halogen or LED) are a little hard to remove, especially once they're greasy.

It's otherwise a really great unit that we love, and it does its job admirably.  A few things to be aware of before buying it:

- Like any high-capacity vent hood, you probably need a make-up air unit to compensate for the air being sucked out of your house so it doesn't get sucked in through your furnace vent instead.  In my case, our old house is leaky enough that it wouldn't have made a difference, but once we get the leaks plugged (since that has direct implications on our utility bills), we'll need to install one.  It can be a bit of a task.
- If you're tempted to replace the halogen bulbs with LEDs to reduce the energy use or increase their lifespan, make sure you pick ones that dim nicely.  The ones that we tried (from Triangle) didn't have much of a difference between dim and bright, and had noticeable 60 Hz "ghosting" when on the dimmer settings; it was bad enough that we're back to the halogens for now.  We'll try some others.
- When you install it, if the fan seems to be scraping against the metal, make sure it's all the way on its post; ours shifted in shipping and I thought there was something defective or damaged about the unit, but it turned out that I just needed to shove it back on so it was on center.  It should spin freely and quietly when it's correct.
- This unit generally requires a hard-wired branch circuit, so make sure you can provide that.  You could theoretically wire-nut a power cord to it, but that's for chumps.

All in all, I really love this unit with the exception of some minor annoyances that I'm willing to get past.  If you have a high output stove, you should absolutely consider this one.