Product review (5 stars): a headache to install, but worth it
We bought this to replace an OTR microwave that didn't suck up anything. Seriously, if we did anything more than boil water, our smoke alarms would go off. So we bought this to keep ourselves, and our two dogs, from going insane each time we so much as looked at the stove.

This took me and my husband all weekend to install, including 4 trips to Lowe's. We took down our microwave and realized it had a rectangle output, so we had to get some ducting from the main vent to this. Part of the reason it took so damn long was because of the way the builders installed the vent stack to begin with, so not the fault of this hood. However, there are a couple things to note as I found the instructions less than stellar. Some of these might only apply if you're doing an under-cabinet mount.

1. There are two small screws on the top vent. Remove these before installing. No mention of this in the instructions, but it can be difficult to maneuver the extraction once the hood is installed. Trust me. The duct should slip between the two cylinders on top and then you screw them all together. Yeah that didn't happen. We just used shiny ducting tape to keep it all in place.
2. You might want some nuts for the screws that go in the top. We actually installed it with the screws coming down from the cabinet and added nuts to keep them all in place. That was easier than trying to go the other way.
3. Make a template of the screw holes in the back and another for the holes on top from the cardboard box the hood is shipped in. Ideally templates would have been provided, but we were able to make do.
4. As others have mentioned, the sticker on the front left some lovely residue. Even after using goo gone, I could still see the outline. The way I got rid of it was by cleaning the hood with vinegar and then wiping it down with a thin coat of olive oil. No trace of the sticker now!

Tonight we put this fan to the ultimate test. I seared chicken thighs for about 10 minutes before transferring to the oven, made a glaze from the leftover juices plus some other ingredients, and stir fried snap peas. I don't think I could have done even one of those things before without setting off the smoke alarm, but this hood allowed me to do all three with no worries.

One day I hope my dogs will get over their trauma and not run and hide every time we turn on the stove. Overall, I'm super happy with this hood as the memories of installing it quickly fade.