Product review (5 stars): Excellent lint cleaner - worked great on two houses
I bought this kit at Lowes and it worked extremely well so I bought a 2nd from Amazon for my vacation home. To clean, I turned on my dryer, connected the LintEater with one section to my cordless drill and spun it from my outdoor vent. I continued to add sections and a LOT of lint came blowing out (because the dryer was on as recommended). The instructions are very easy to follow. While it spins, it makes its way around bends, etc.  easily though in one bend I had to pull it back and then go forward again. At one of the houses, it made a big difference in the drying time of clothes because there was a lot of lint in the pipe.

One Caution: In my first use, I screwed up - I wasn't certain of the exact distance from my exterior vent to my dryer and because it moves so easily, the LintEater spun several feet into my actual dryer and hit the dryer's spinning exhaust fan - and broke it - completely my fault for not knowing the distance. If you aren't sure, I'd strongly suggest cleaning it first with the dryer off - and then do it again with the dryer on once you know the distance.