Product review (4 stars): Great product, installation more challenging than it needs to be.
This is a very elegant vent hood and dramatically improves the look of the kitchen but here are some installation drawbacks that I discovered and impromptu solutions that you might want to consider if you buy this product.
The directions for installation are really quite pathetic and there are some design flaws that make installation harder than it needs to be.

The duct inside the hood is a cheap flexible aluminum which in the long run is a bad idea because grease will build up in it. Furthermore, it is 5 7/8" diameter which means it won't fit over a standard 6" duct to the roof. Trust me, I struggled with it for 30" before deciding it was not worth it.
You're better off getting 6" starter collar (which you will need since the attachment to the hood itself is 5 7/8" (see pics)  You can then directly connect a 6" sheet metal duct to it and run it to the roof vent. Makes for a cleaner and more sturdy install. Use metal tape to seal off the connection to the hood and in my case the transition from 6" to 7" (because the roof vent was already 7")

Second. the bracket that is designed to attach to the stainless collar only has tapped holes for the screws on only one end. If the holes had been slotted it would have been fine, but as it stands they are plain tapped screw holes. This poses a problem if you are trying to get the vent collar all the way to the ceiling.  It is incredibly hard to drill holes near the ceiling (1/2" away from the ceiling) to attach the bracket.  I inverted the bracket so the holes to attach the bracket could be drilled a little lower down, but I had to drill/tap additional holes in the other end of the bracket, so I could attach the collar.

As other readers had mentioned the lights are a little dim, and they are 3000K which make them more blue than the typical 2700K which is more daylight.  If I can find replacement lights that are higher lumen output and 2700K I will replace them.

Aside from that the product works well and looks great