Product review (5 stars): Durable and flexible, saved me hundreds of $'s
My dryer works better than I imagined it could now that I cleaned my vent.

I had so much buildup that my dryer was burning out safety fuses.  I thought I was going to have to buy a new dryer, until I cleaned the vent out really well.

At one point in the cleaning process I created a giant plug of lint that completely sealed the tube about 10 ft into my wall.  I duct taped a straightened metal clothes hanger to the end of the shaft and drilled through it.

I used my dryer on the "no heat" setting to blow out the loose debris.

Then I finished the job with the brush.

I would highly recommend this product.  Mine is currently on loan to a friend.