Product review (5 stars): Great product!
Works great!  Exactly what I needed to clean out my dryer vent.  I also ordered the Gardus extension and it connected without any issues.  I have a 90 degree bend/elbow and this made it through without any problem.  I had to give it a little more of a push but no issues after that.  I did attach a drill to spin it clockwise and that was definitely needed.  That spin cleaned out the lint that was stuck to the walls.  I would recommend this without hesitation!