Product review (5 stars): Good price for vent that works.
For the price it works just fine.  It is nothing fancy but looks appealing in place.  Easy, Easy to install but do check your vent size as its a 7" and does not come with a damper.  I had to order the damper and reducer separate.  Damper and reducer worked great with my 5" duct.  People mentioned it was loud on high, well it is only $50 I would expect if I purchased a high dollar unit and it was loud then maybe i would say something.  It works just fine on low if the noise bothers.  Sucks the air just fine both high and low.