Product review (4 stars): Dryer fire preventor
We could hardly wait to receive this product.  Our neighbors hired a contractor to clean out their dryer vent and this is the product that he used.  It wasn't complicated at all.  We also bought the extension rods to go with it as we have a pretty long run from the dryer to the outside vent.  It worked well.  I was a bit afraid that it might come unsnapped deep in the vent, but it did not.  It pulled out a tremendous amount of lint and debris from the vent.  It sped up the drying time and has saved us money in electric bills.  The greatest peace of mind that it has given us is to know that it helps to prevent dryer fires.  Safety is our number one goal.  Our only draw back with the product itself was that the first few attempts when you would press the button on the drill is that it would easily twist up on itself.  We remedied it by stepping further back with the drill and walking backward with the drill as each section length came out of the vent.  You will need a pretty long extension cord and a two man operation to do this the way we did it. I would also have to recommend either running the shop vac attachment along with it or purchasing the mesh bag attachment.  We found that we had so much lint and debris built up that we released back into the air.  It was quite messy.  The person who is closest to the vent, might want to consider using a mask to fliter out the lint that becomes airborn.  All in all it is a product that I would highly recommend.