Product review (1 stars): Extremely loud... when it was working
UPDATE on warranty repair.
Manufacturer replied to my email within 24 hours, which was promising. She tells me from the symptoms Im describing it needs a new motherboard and control panel. She says replacing them is easy; plug and play
Got the package about a week and a half later, which was a real inconvenience because we had no exhaust hood over Thanksgiving.
Replacement wasn't easy. It involved removing and replacing the motherboard and front control panel in very tight spaces. On top of that, the stamped metal edges are EXTREMELY sharp. I left some blood on this little job, but its working.

Have been using this hood in my kitchen since 6/2015.

The good:
Compared to other 30" hoods, its relatively inexpensive.

The bad:
It's loud. Very loud. When I'm cooking at the range, with it on max exhaust, I can't hear anything unless you're talking over my shoulder.
I vented it to the exterior using straight, round duct to maximize performance. I've no way to measure airflow, but I'd be surprised if it was moving the rated 400 CFM.
Owners manual reads like it was translated from Mandarin, to Portuguese, to English.
Control buttons are flakey. Sometimes they work, sometimes they don't.
The clock is horrendously fast, only displays 24hr format, and there's no way to simply turn the display off.

and finally, it stopped functioning as of yesterday.
Manufacturer website says it has a 3yr warranty.  I've contacted them, and am waiting for response.