Product review (5 stars): Will pay for itself after first use
Finally used it after months of it sitting in the corner.  Flexibility of poles is great.  My dryer vent system has two 90 bends within 16 inches of each other and work smoothly.  Brush cleans up vent very nicely after several passes and vacuum attached is a plus  Read instructions before using.  You don't want to have this stuck in vent.  One use and it already paid for itself.