Product review (5 stars): Easy and convenient. More importantly- works!
My dryer was obviously backed up, even being only a few years old. Clothes weren't drying and running it was quickly becoming a fire hazard. This kit was incredibly easy to use and pulled a bunch of wet lint out of my vent. I just started unhooked the vent from the back of the dryer and went in that way. The other end is on my steep roof, and I ended up not having to go up there which was great.  I also used the tool to clean out the lint trap in the dryer which had a surprising amount of lint make it past the trap.  Much cheaper than calling someone to do it, and the convenience of not having to wait on someone else to show up or take off of work.