Product review (2 stars): Metal bushing failed on nylon rod - got the job done in the end
I gave a 2 stars because the female metal fitting on the nylon rod failed and spun off the rod. I was able to complete the job by using another rod as I also purchased the 4 section 12' extension kit.  At least this problem occurred at the near end of the drill and I was not stuck with a failed part inside the vent in the wall (that would have been terrible).  I have emailed Gardus asking them what to do as there is no warranty that I can see on the instructions or on their site.  Got the job done after some frustration so that is why giving this product only 2 stars. Still cheaper than getting someone to service cleaning the vent. There was lots of lint that came out so I am happy I have a free flowing vent now.