Product review (3 stars): Well my son was doing this for me and mistakenly he felt like he was stuck so he put the drill in ...
I purchased this and was excited to try it out.  The problem with my house is it has 2 - 90 degree turns, and these rods bend,  Well my son was doing this for me and mistakenly he felt like he was stuck so he put the drill in reverse.  This caused the first rod and attachment to get stuck deep inside our vent.  When looking at the directions for how to retrieve this attachment it said we would need to order a special part.  Knowing it would take days to get this part and couldn't use the dryer this was a problem.  I feel they should include the part when you buy the device.  Well my son came up with an awesome idea and hooked up our leave blower to the inside hole of the vent and blew out the attachment and rod.  Plus it blew out a huge chunk of lint.  I think we could have just used the leave blower to clear out the vent, and saved ourselves some money.