Product review (4 stars): Let me begin with the good news.
Let me begin with the good news...the finished product is solid, handsome and works well.  It is a high quality unit and presents well.  The unit after all needs to be a show piece since it sits right in the middle of the kitchen and is certainly a focal point of the kitchen.  Any less than great and the whole effort would be wasted.
Now the reality of installing this unit.  I have ducted the exhaust in the ceiling between joists to the outside to a flappered vent unit that I purchased from Loews.  The noise level is moderate and the effective removal of steam/smoke is certainly adequate although the highest fan setting is anything but quiet.
This is not a unit to purchase if the ceiling is less than 8'.  Even at my ceiling height of 8' I had to shorten both chimney sleeves by cutting the stainless sleeves...the cut ends can be hidden easily.  Since the unit has to be assembled before the angle irons are fastened to the top plate, this creates some difficult maneuvering.  The hardware that comes with the unit is ALL WRONG.  The screws are too short to fasten two overlapping angle irons.  There are no washers, no star washers or stop nuts to prevent the assembly from loosening after assembly...there is vibration from the fan motor which will, over time, loosen the fasteners unless there is some attempt to lock them in place.  The unit weighs over 50 pounds and you don't want it to be crashing down onto your island.  The hardware kit comes with plastic anchors for the top plate to be fastened to the ceiling.  Seriously??? I created a substructure of wood blocking so I could screw the top plate to something solid...no way plastic anchors would hold this unit up.  I built a stand which would hold the unit up about 2" lower than the top plate so I could gradually raise the assembled unit into place to be fastened to the top plate.
Bottom line is that the finished installation looks great and is solid as a rock but getting there was an engineering challenge...and don't think there will be any help from the instructions...they are the worst instructions I have ever seen. My suggestion is that the manufacturer should provide adequate hardware, much better instructions and tone down the LED lights (you will need sunglasses to cook under them).
Otherwise, great fan /hood unit.