Product review (5 stars): The vent is too big for a plumbing snake to do any good, and yet the vent is too small and ...
I purchased the LintEater several months ago and finally tackled the dryer vent today, it has been blocked up for years. I have a mid-century modern house in which the dryer vent goes straight up from the floor thru the ceiling  about 10-12 feet in length. I could never figure out how to clean the vent which had who knows how many years of lint stuck up in it. The vent is aprxly 6 inches in diameter with a 90 degree bend at the beginning. The Linteater was very simple to put together. I did duct tape the joints (there are 4 poles that you twist on each other)so that the poles did not come accidentally apart, as the instructions suggested. I added a pole one at a timeand began cleaning the vent,  until I had all the poles  on and the poles  reached all the way to the top (I think). I would push it up and pull it down and the amount of lint that come out was a lot (2 small shop vacs full). The LintEater worked as advertised. Without it, I don't know how I would clean this vent. The vent is too big for a plumbing snake to do any good, and yet the vent  is too small and curvy to try an stick a broom or other straight stick object down. The poles bend but not too much that they fold in on each other. All in all, it is a very inexpensive price for cleaning out a very difficult dryer vent.