Product review (4 stars): Really good brush. I'd give it 4
Really good brush. I'd give it 4.3, outta' 5 stars.  I'm good with tools. This one is not for novice repair people.  It requires someone to be versed in tools usage.  I suggest, if you're not a tool person, have your dryer duct cleaned by a reputable professional.  You can end up creating a larger problem, if you don't clean your duct correctly.