Product review (5 stars): The real deal
So, this tool by itself is friggin' amazing! It's been almost a year now that my wife has been complaining that the dryer isn't doing it's job very well. I told my wife that the vent is most likely clogged. She was very skeptical when I suggested it was clogged and that I could clean it...

The pictures by the vent show the aftermath of what I could get with just the brush. I'm pretty certain I pushed a clog up to the top of my vent (my dryer vents to the roof). I didn't use a drill, just my two hands. I would bet if you know there is a clog, using a drill would make it even more amazing. Simply put, I would bet this saved my house from a fire.