Product review (5 stars): Great tool, value priced, glad we found it!
We've been buying from Amazon for years: our first review, a rave. Definite buy.
  We live and work in an old New England farmhouse. My wife's acupuncture practice is on the first floor, our apartment on the second. Our second-floor dryer is vented through the ceiling into the attic, then along joists, and finally out the side wall. It's a run of 19 feet! Too long by far, but this 1850's house wasn't designed for a dryer on any floor.
  When we got the LintEater we also bought the 12' extension kit, so we have 24' of rods. The LintEater and extensions worked well together. If you have a long run, buy the extensions at the outset.
  We last had our piping cleaned by a chimney sweep company in summer 2012. That cost $159. We paid a little less than $50 for both. We were way overdue for cleaning, so we figure we saved almost $320 (minus their cost).
  User notes: The printed instructions are clear. There is video instruction too. Our piping is all PVC. The rotary brush and rods had to turn two 90 degree corners; they did so without a hitch.  Note: make sure to ONLY spin the rods clockwise even when withdrawing them, otherwise they'll decouple and you'll have rods in your piping.  (For non-instruction followers, they also sell a rod extraction tool. ;-)
  Also, we used a slightly different method. We fed the rotary cleaner in and out, then put our narrow vac wand into the pipe opening, vacuumed what we could, then withdrew the wand, added the next rod, connected the drill and fed the whole thing back in. Repeated. Using this sort of back-and-forth "sawing" system we gradually added enough rods to clear the entire 19 feet.
  BTW, while we knew we had waited too long to do this, we were still amazed at the amount of slightly damp, condensed, lint goo we extracted. We just did a test wash and dry: drying time was almost half what it had been. Sweet!
  As an amateur carpenter, I appreciate good tools. This is a good tool. Buy it, use it, take care of it...save money.