Product review (5 stars): You'll be glad you got this one instead
I bought this LintEater kit plus a competitor's kit (everbilt) to use as an extension if needed, since my duct is 24` long and the other kit was the same price as the extension. I ended up not using the other kit at all and will be keeping this one as this kit is superior in every way:
* the rods are much more flexible, yet just as strong than the other kit.
* the brush on this kit is better designed in my opinion. It has tufts of bristles arranged in a spiral pattern, with plenty of space for chunks of lint to blow past the brush. The other kits' brushes are arranged in rows, but with even gaps between bristles, so I believe they are more likely to shovel lint in front of the brush if you are pushing the brush upwind. For light lint loads the other brush may be better for "polishing" your ducts, but if the job gets tough, the LintEater should be better.
* My favorite accessory: the vacuum hose adapter. I duct taped a vacuum hose to my leaf blower, attached the other end of vacuum hose to this adapter, threaded the rod (with brush attached) through the small port provided in the adapter, then plugged the adapter into my vent after feeding the brush into the vent. I was then able to brush the first 12' of duct from inside the house, with air from the leaf blower pushing the lint out of the other end of the vent. Then I removed the brush, plugged the small port with a provided plug, and plugged the adapter back in the vent. From the outside of the house I was able to clean the outside 12' of duct, with lint blowing out the vent towards me. A little messy but not bad. If I used a 12' extension, I could have done the whole job from the inside, but this worked almost as well.
* there are two small set-screws plus an allen wrench provided; one is used to lock the brush in place on the rod to avoid a disaster in case you accidentally spin the rod counter-clockwise.
* there is a metal clog ripper that I didn't need to use, in case you have a nasty clog of lint to remove that is too tough to dig through with the brush.
* there a smaller diameter brush that looks useful for brushing out ducting within the dryer. This brush attaches to the same rods.
* I have no idea what the "french fry cutter" is for unless it is to collect all the big pieces of lint at the outlet so you can watch them all come out at once? Not sure why you would want to do that. Or maybe it helps prevent you from running your brush into your dryer if you are running your dryer to blow lint outside and brushing from the outside in. I should have read the directions.

I did use duct tape on each of the joints as I fed the brush in, as it doesn't take much counter-clockwise torque to start unscrewing things. I would not run this counter-clockwise on purpose; it won't take long for the duct tape to come loose and then you will have fun getting everything out of the duct.

I found that these rods could screw into the everbilt rods, but the everbilt rods could not screw into these rods. If I remember right, the everbilt rods would not fit the LintEater brush, so I would have had to use the everbilt brush if I wanted to combine the two kits to get a 24' length. I decided it wasn't worth it. If I really wanted 24', I would buy the LintEater extension (I am returning the everbilt kit to HD).

When I bought it, this kit was the same price as the other kits, but it is definitely worth paying more.