Product review (5 stars): Wow!
We have blown our dryer vent system out with the shop vac a few times, and feel like we do a good job with the dryer's lint screen overall.  But after having to replace the vent on the exterior of the house and seeing some lint still in the duct work, I looked for and found this product.  Can't compare it with any other brand, but I was impressed with the amount of lint I was able to dislodge with this.  I had to use some Swedish ingenuity to extend the rods longer (I needed about 27 feet), but it all worked well. Didn't take much time, and made a believer out of me. I definitely recommend using duct tape around the rod joints, and set the drill on a low setting. This was the first thorough clean out in about 7 years. They recommend doing it 4 times a year or so.  I'll probably try it again in a year, then go from there.