Product review (3 stars): Not bad, moves a lot of air.
A lot smaller than I realized that it was.  Bottom line is that if it has the cfm size doesn't matter.  But...the small size kinda makes the liner a requirement.

Since I didn't realize how small it was, it changes my perception of what the fit/finish looks like.  This is a small little power pack insert.  It is not meant to replace a normal off-the-shelf hood vent.  It is very plain.  Buy this (and the liner), give it to your cabinet guy and tell him to build the cabinets around it.  And...tell him that you don't want to be able to see it.  It's not a good looking piece.