Works well, wears out kinda fast.
As headline says - this thing does its job.  In the beginning it will be very easy to push smoke through.  However, as the charcoal filter inside gets gunked up with whatever crap it's filtering out, it will become harder and harder to use and the smell mitigating effect will fade.  This happens a bit quicker than I would like for the price of the unit which is the only reason I'm not giving this 5 stars.
Rating: 4 stars