Product review (5 stars): Excellent product
First impression as I have not installed yet so cant comment on efficiency.  I can comment on the quality of the design and manufacture.  Both are excellent.  The video showing the simplicity to thoroughly clean the hood is what prompted me to purchase this product (along with the reviews).  The product was packed for shipping in the most efficient way I have seen short of encapsulating it in a foam block (which is a pain to unpack).  I have found no sharp metal edges anywhere on the hood, most pleasant!  The design is as good as I had hoped.  Fan noise (unmounted) is no more than the microwave it is replacing and airflow is impressive on high speed.  Controls are simple and work well.  Disassembly for cleaning is a joy.  Appears to be a quality product in every aspect.

Follow up review:  Everything I said previously still stands.  Love this hood, its been installed for a week now and seems to work very well with a 6 inch duct making a 90 degree turn and exiting out a side wall of our home.  Noise level is actually lower than the microwave it replaced unless on high speed. Captures fumes and smoke very well, it actually pulls smoke from 18 to 24 inches in front of the range (did a
smoke test to prove this)  Great range hood, Kudos.