Product review (4 stars): Powerful and quiet but mounting is a chore
It is quiet and powerful. Much quieter than the old range hood or the built in fan in the Samsung over-range microwave it replaced (too little headroom). If anyone finds that it isn't moving enough air then it is possible they damaged the damper during installation or that they are using small diameter ducts. I had a 7" duct straight through the roof, so I needed to fit an 8-7 reducer on top of the unit. To test the extractor fan I put a large frying pan with a small amount of water over the 18,000 BTU burner at the front of my range then got it boiling hard. With the fan at the highest setting (fans actually, there are two) the steam went straight up and vanished into the grates.

Mounting is a chore. This does not come with a template and getting the screw holes in the correct place is critical. I had a 3/4" gap above the mounting plane, I used two 1x4x10 red oak blocks to fill that and provide a strong attachment point. Since this is America that 1x4 is really 3/4 x 3 1/2. The screw provided for mounting don't work under a cabinet. I now had 3/4" oak then 3/4" ply to mount to and the screws they supply would only really work in a brick wall. I used 1 1/4" #12 wood screws started about half their length. Getting it lined up and hooked on then tightened in place was a two person job and quite frustrating. They should supply either pan head wood screws or some sort of toggle bolt to mount the unit. I am thinking of replacing the wood screws with bolts, tightening from below was a real pain in the back.

The grease collection design is pretty sweet. One review complains that the grills are hard to clean... they are designed to be run through the dishwasher, seams easy to me. The grills are designed to condense and drain airborne grease to a trough at the back of the unit which is easy to slide forward and out. The centrifugal fans also have grease drains which run down to the same troughs. From time to time you need to slide this forward and empty/clean it. At 30" it won't be going in the dish washer.

I bought this for the high airflow and the grease capturing design was a bonus.

On the down side the LED lights aren't very bright, they really need to spend a couple of extra bucks fixing that and provide better mounting hardware.