Product review (5 stars): Worked great, job wasn't bad at all.
This worked great for me.  My dryer is fairly close to the outside, and even so, it the length wasn't quite enough to make it all the way, end to end, but it was close.  Everything went fairly well.  I unhooked the vent from the dryer, so it was a little work - that's never fun for me - but every thing else really went pretty smoothly.  Great purchase, saved me a lot of money in exchange for a little time.  First time the vents have been cleaned in 11 years (us with 5 kids, lots of laundry).  Made a huge difference in drying time and how thorough loads dried.