Product review (4 stars): It looks great. We were replacing an over the stove microwave ...
It looks great.  We were replacing an over the stove microwave that hardly took any fumes out.  We were setting the smoke alarms off every night before and now we never do.  This thing definitely works.

My only two knocks agains it:
1. I wish the lights had a bright and night setting.  The lights aren't crazy bright but they also aren't too dark.  Somewhere in between.  Not a big deal.
2. The instructions looked to good.  I've bought things before with instructions that you just know are going to be a problem and this didn't look like it at all.  They just weren't good AT ALL.  If you are handy, you can figure things out.  I had to call the company and the lady was helpful so I liked that.  I just can't believe how lacking the instructions were!  I imagine that some of this is because it's hard to know exactly what you are screwing this into.

There were no holes on the back of it to secure it to the wall.  The screws that came with it were never described as to what was what.  I assume they wanted you to put some self tapping screws back there but didn't explain that or which screws.  I ended up drilling 4 holes in the back and using all of my own screws on hand to install it.

In short, we love it and it works well but man, they could make it easier on you!