Product review (5 stars): Buy it.
This thing is great. I have a dryer vent that has around a 10-12 foot run. There are three 90 degree bends and it runs between the ceiling of our finished basement and the floor of our main level. It was completely clogged, so I used this item as soon as it arrived. With very little effort, I removed the lint and the dryer was back to normal.  Now that I have the right tool, I'll stay on top of keeping the vent line clear.
If you searched for this item, you probably need it and should just go ahead and buy this one.