Product review (3 stars): Hood Great - Broan QC BAD
The hood is great and is exactly what we were looking for.  It is very slim, powerful and quiet.  We were a little worried about the heat sensor coming on when we didn't want it to.  It hasn't been a problem.  It hasn't come on once during, normal cooking activities like warming water, cooking items with lids on, etc.

On the other hand, Broans quality control (QC) is very bad as well as is their installation manual.  We went through 3 hoods before we found one that was in acceptable condition.

In the first hood, the stainless sheet metal wasn't folder correctly on one end and created an unfinished look. (the dimensions may have been off a tad as well)

The second one had a dent in the top at eye level.

The third was more or less fine.

Returning 42 inch range hoods isn't fun and amazon was not as smooth as they typically are with these hood returns.  They were nice and accommodating, but due to the price of the item paid shipping labels are not auto generated and you have to call amazon back with how much the shipping was to get reimbursed and it confuses the normal amazon system.

The installation instructions are for the small model which means all the holes and screws in the 42 inch model are different and don't match the pictures.  The cutout in back wasn't punched out which the manual didn't mention.  All in all, you can figure it out, but it was not step by step and if you didn't actually think about what things were for and how the hood needed to work, it would have ended up not working by just following the instructions.

5 stars for the hood and 1 star for the QC and instruction manual gives a 3 star average.