Product review (5 stars): This works great!
I've got a 25-foot dryer vent run with several elbows in it. After almost 25 years and lots of laundry, I decided it was time to try to clean this thing out.  The LintEater (plus 12-foot extension kit) made it work very easily.  I got a huge amount of lint -- surprising how much was in that pipe.  Looking forward to shorter dry times.