Product review (5 stars): Product works well
Product worked well.  Needed extension because our vent goes straight up to the top of a tall steep roof.  The brush went all the way to the top with no problem on a battery operated drill.  Cleaned out half of a trash can full of lint.  The dryer works great now.  It is a messy job but  the lint eater works better than paying someone to do it.  Reduces fire risk too.  Only took 1/2 hour.  It's best to have a dry vac to help suck out all the lint.