Product review (5 stars): 5 stars because for the price it can't be beat
You really have to ask yourself what your expectations are when you're buying such an inexpensive range hood.
Pros:
Looks great
Fan has adequate power
LED lights are nice (although too cool of a color for my taste)
Packaged well
Cons:
Like everyone says, the fan is loud
Don't use the flex ducting it comes with, as that is usually not to code

I installed mine myself with rigid, single wall ducting, and actually had to put in two 90 degree bends plus choke it down to 4" at the end in order to terminate it through the existing vent through the roof. Not a problem, fan still works very well and pulls up plenty of smoke and stream from our range.  Yes, on the highest setting the fan can be loud however I wouldn't say its TOO loud. If you installed your ducting correctly it should never sounds like a rattle, just a steady whoosh. The fan noise is not a problem for me, considering what I paid for it.

What is boils down to; you're looking at the price and asking "what's the catch?" It's the loudness of the fan. For me, this caveat was well worth the low price and I'd recommend this fan to anyone not looking to break the bank on upgrading their kitchen.