Product review (5 stars): Having said that I'm so pleased we went with this one
While updating our kitchen I read so many reviews on different models of vent hoods.  Having said that I'm so pleased we went with this one.  From start to finish it took us around four hours.  We did it with two people right up until the final mount.  It "could" be done with two, but I would recommend three people due to the weight.  Here's my recommendationsL
1. This unit is not hard wired.  If your current one is and you're replacing it with this you'll need to adapt it to a standard outlet.
2. While the directions aren't great, the unit is fairly simple to put together with what you're given
3. It comes with a flexible exhaust stack, so if you prefer a solid stack you'll need to have it ahead of time
4.  Be prepared to have a brace in your attic in order to mount it.  If your old hood has one, chances are it will need to be modified.  That's probably the most time consuming part, but again nothing hard.

For now I can that this unit is VERY attractive and works very well.