Product review (5 stars): Easy to use, works very well
I needed this product quickly and it is not Prime, so I bought it elsewhere. But, I can say it worked really well and I have what has to be close to a worst case scenario. Our dryer vent has to go all the way across the garage then up between the first and second floors. I bought the extension kit (another 12') to make this work. Hooked up a shop vac with the handy attachment that came with the kit and cut it on. Went outside on a ladder with my cordless drill. Slowly fed it down the vent working it back and forth. It completely filled up the shop vac 1.5 times. The only time I had a problem, in which I could tell there was no inbound airflow, was because the hose on the vac clogged. Fixed that and was through in 30 minutes. Swapped the vac around to blower mode and slowly retrieved the brush... carefully getting off to the side to avoid the blowing remains of lint.

Follow the directions! Use the drill with the clutch half way and turn clockwise and you won't be disappointed. There are two major turns in our vent and I used all of the 24' (with the extension kit) so about as bad as you can get.

I was getting estimates of $130+... no way.