Product review (5 stars): A beautiful addition...
This hood was purchased as part of a kitchen remodel, with a new cooktop in a large island.  It looks and works outstandingly; rather than detracting from an open feeling, it seems to add to the overall ambience.  The electronic features are noteworthy.  The first two fan speeds are quiet, and the third (which is the one most used) allows for normal conversation.  The LED lights provide plenty of light, and when dimmed allow a soft glow.  My wife did find that when boiling water using an edge burner, that some steam escaped from the vent, even at higher fan speeds.  For that reason, I would recommend going with the larger 42-inch size.  One caveat:  The vent requires an 8-inch size, and proper 2x4 bracing in the attic for the hood frame (use the cut-out and note the dimensions which are not square).  Also, lifting the assembly to attach it to the ceiling brace is a two-man job.