Product review (3 stars): Beware!
It is just "okay".  I had my handyman put it up and he said it was cheap.  We did not  know if the fan and duct would stay attached...it did.  My handyman had to put in a couple extra screws so it would be more secure to the wall.  In the beginning we had to plug it in just to see if it worked (we were thinking it might not).  I would not recommend it.  To do over I would pay more and get something more sturdy.  Buyer beware!