Product review (5 stars): Clean vents work better!
I got this and an extension kit.  It is so much easier than what I did before by running a thread through the vent and pulling a brush from one end to the other.  This LintEater works great and now my drier works great too!  Even without using a drill you can clean vents by hand.  If you own a dryer you should also own a LintEater.