I used this to clean my chimney, a fireplace insert with a stainless steel flue liner. It worked as expected, went round all the angles and transitions with ease, and the result was a clean chimney. I give it 5 stars but do want to point out that is not professional quality. If that's what you expect you would rate it lower. For homeowners using it once or twice a year it is perfect. It more than paid for itself in the first use ($80 for tool vs $150 to get a Chimney Sweep to come to the house.)
DANIEL C WINSOR 
