Product review (5 stars): Worked about like you think it would
I've got a long vent tube to the outside of my house so I had to buy the 12 foot extension kit.  It did the trick.  I had some moisture in the tube that mixed with the lent and it bent one of the rods when it locked up after a lot of torque.  I'm not sure if I can use that particular rod again or not as its a little mangled now.  But one broken rod is not the end of the world.  Easy to do and saves a lot of money vs having someone come out and clean it.