Product review (4 stars): Does the trick. Be sure to tape the connections and watch out for flying fluff!
I have a newer dryer that complains when it's time to clean the vent. My machines (and vent) are on the second floor, right next to an exterior wall.

I was able to snake the vent from the ground floor with all the extensions added. It did a very thorough job.

Next time I think I will use the shop vac attachment (comes with the kit) and go up on a ladder because the fluff went flying everywhere as the brush came out.