I needed a 36" replacement and upgrade my 20 year old range hood. This QS-90 has dishwasher safe baffles and a grease trough. I upgraded my wall exhaust duct to 8 inch diameter to get maximum air flow. At fan speed 4, it feels like it is pulling at least 500 CFM (it has 2 fans). It has simple, classy good looks. It comes wired with a plug so you can test it before mounting. Cons: The exhaust flapper vent usually closes to one side, so I easily removed it because my outer vent has a flap. 2 fan motors mean its very heavy. The mounting slot holes are exactly the same diameter as the screw washers, no wiggle room. The exhaust collar is tall, so the hole template holes needs to be elongated  to the front, not round, to accept it when you are lifting the unit to mount it. The electric cable has a safety stress clamp which forces it to the side a bit, which means the wire will not easily enter the templated round hole. Could use multiple light settings.