Product review (4 stars): cleans like a charm
Our dryer vents out to the roof from our second floor, so this has been perfect for occasional cleanings.  I'm still paranoid with the connectors getting detached, but I didn't have any issue thus far.  An odd issue that I'm having is that the attachment doesn't fit with my Black and Decker drill -- which I thought was pretty much standard.  I went ahead and turned it by hand and had a pretty good forearm workout.