Product review (5 stars): Did the job great
This worked great for cleaning our very linty dryer vent. A word of caution, though -- make sure you actually clean all the lint out and not wad it up into a big ball making the blockage worse. I thought I was done cleaning the vent (ours goes up a section of basement wall to vent outside), but the brush stopped going completely thought. I thought it was catching on part of the vent and that, surely, I'd gotten all the lint out. Nope. I caused it to be almost completely blocked instead. So I had another go at it, got another pillowcase full of lint out and finally got it completely clean.
Our clothes now dry in one run of the clothes dryer, rather than 2. It was well worth the effort and sweat.
The rods are firm enough to push through blocked, narrow vents (ours is actually a lot narrower in the wall) but flexible enough to go around 2 elbows. I'm so glad I bought it.