Loud, sucks hard, and easy (to install)... usually these arent the qualities you look for unless its a range hood exhaust.  

I did my own install so I ensured the exhaust had a straight shot out of the roof.

This is a great product for the price.  

Pros
- Great design
- Powerful fan

Cons
- Loud
- The vertical extension is not screwed on, so its a little flimsy looking.  I would have liked it a lot better if the vertical drop down extensions were screw in vs. Clamp ons.