Product review (3 stars): good kit with some caveats
first thing first: it works. the kit is great in what it consists of and the price is just right i think. to call someone to clean my dryer vents i got quoted from 80 all the way up to 200 bucks. so if you were able to do it yourself you will need to invest a bit more in a "construction" vacuum that cost about 80-100 bucks and start the savings basically from the second time you do it.

so whats with the 3*? my brush broke inside my vent!!!! while i was pulling it out, and yes i was using a drill, all the pieces came out except the round brush. i had to climb to my attic and push it from the other side to come out... what was supposed to be an easy task ended up with me spending over an hour extra in climbing in my attic, disassembling the HVAC pipe so that i can get in there and push down on the brush...

another minus for this kit is that while it is fairly bendy, it will not go very smoothly through your flexible insulated pipes and most likely push the pipe out from its connector.

with all that said, if your vent duct doesnt have to many bends, and you want to take the risk (maybe i had a defective kit that the brush broke), you might save a lot of money doing it yourself!