Product review (5 stars): Very happy with RKE56
RKE56
Cons:
1) Very hard to install the non-duct plenum (top part where the air is expelled and the metal case  is flushed against the ceiling).
It is 7-8'' deep. It is flushed against the ceiling and has 2-3'' clearing to secure two screws against the wall. Very hard to reach with regular screw driver. Needed to purchase a foot long magnetic screw driver. Phillips head.

2) I had to cut 6'' off the lower external decorative flute. Then sand it because the edges became extremely sharp  and could cause cuts. However once the lower edge of the flute was placed inside de gap around the glass canopy all was hidden and perfectly aligned.

Pros
1) beautiful.  Once in place every effort is worth it ten folds.
2) light is soothing. Like spotlight.
3) relatively quiet.
4) efficient. Removes the food odors 85+%.
5) increases the value of the kitchen and home.