Product review (5 stars): Great Product
We have 12 feet of dryer vent with 2 elbows.  After 15 years of dryer use, we knew it must clogged so I ordered this product.  Oh my gosh!!!  We almost filled a 10 gallon trash bag with huge balls of lint.  The tool is ver simply to assemble and use.  It worked exactly as described.  Believe me, we will be performing this task once a year.  A clogged vent is a fire hazard and I am thankful, after seeing the amount of junk that we removed, that we did not have a fire!  Also, the dryer now operates more efficiently and the clothes dry more quickly so there are absolutely no negatives to owning and using this handy gadget.