Product review (4 stars): Not alone
Do yourself a favor and have another person there to help. Knucklehead me tried to install it alone and scratched my brand new stainless range, the hood AND the damned wall.  The. Hood is decent quality.  Looks good.  However, the hole for the external air vent does NOT match the old vent.  it is a couple inches off.  So I removed the mounting screws and just shoved it in then mounted the hood.  As another rater said the stupid little piece of plastic the supply  to cover the internal vent in front is cheese at the very best.  Had to try a few times to get it to stay ohen the fan was turned on.  Oh - the fani is pretty quiet - at least compared to my old ones which sounded like aleer jet taking off.  I recemmend it.  cheers.