Product review (5 stars): Full capture and containment
I have this hood in my apt and my tenant's apt. It captures all the grease and smoke. No more nuisance fire alarms.
Hood came with a short length of 8" round flex duct, but no damper. You will want to purchase a backdraft damper, and a hood wall cap. Neither of my ranges covered are on an exterior wall so I had to be creative with the duct. In my apt I punched up into a soffit then turned 90 and ran the duct about 20' horizontally through an attic space to an exterior wall. In my tenant's apt I punched up through the cabinets, turned 90 to the left and ran the duct along the top of the cabinets about 6' horizontally to an exterior wall. I had a carpenter build a chase way above the cabinets to hide the ductwork.

Here are some ducting tips:
1) Avoid dips and traps in the duct run. Select the most direct run using the fewest amount of elbows and transitions.
2) Use rigid metal duct if possible. Slope the duct back towards the hood so that any condensed grease will drip back towards the hood.
3) For long duct runs consider putting in a cleanout access door for duct cleanings.
4) If the duct is running through an unconditioned space, consider insulating it to prevent condensation. Also not a bad idea to wrap all the duct in fire wrap/insulation for improved fire safety.