Product review (4 stars): Superb and quiet fan - see install note
This fan is excellent 5 stars for function!- very quiet, 4 bright lights! and at 630 CFM (horizontal discharge only) you can sear multiple steaks on a professional cooktop (we have a Viking) and not smoke yourself out of your kitchen!  That said, read on for a few installation notes:

This product arrived with a good set of install instructions.  We installed the hood per specs but the fan had a wobble to it because the top part of the structure is thin, non-reinforced stainless steel.  We mounted this on 5 screws, as the instructions stated and used 1" strips to flush mount with the bottom edge of the cabinet.  (Side note: most modern cabinets have an overhang on the front edge, the photos in the directions even use wooden blocks at the screw mounting locations.  We did the same).  Basically, if this hood were flush mounted so the top were flush to a cabinet bottom all the way across the fan would not wobble.  We phoned Braun who were exceptionally helpful on the phone!  We ultimately sank in 2 additional screws to support the weight of the fan and this solved the problem.  A tip would be to install a solid piece in the under-cabinet to completely fill the gap between cabinet and hood as you'll have a full surface to sink extra screws if necessary.  Braun - great product in terms of function but you may want to consider reinforcing the fan with more structure.