Product review (4 stars): I don't know how we didn't have a dryer fire!
**Updated**
I didn't realize we had that much dryer lint CLOGGED in our dryer duct working.  We just pulled out 4 vacuum canisters full of lint. And we are not event to the roof yet.
Plus:
1. Very easy to assemble
2. Very easy to use.  Attaching the rod(s) to a drill makes it easier to move the brush up and down the vent and it helps clean the duct wall.

Cons:
1. Brush only comes in one size 4" stove brush.  My duct work goes from a 4" pipe to a smaller size 2.5"  If you have this condition you may want to invest in a kit that comes with an additional stove brush.  Example LintEater RLE202-L
2. Does not come with a vacuum adapter.  The LintEater RLE202-L comes standard with a vacuum adapter that lets you run a shopvac while you operate the stove brush in the duct. You can achieve the same outcome by having your vacuum/shopvac handy.