Product review (5 stars): Works very well.  Realize this is only 12ft, and consider attics, bends, and the like.  Consider extra kit or extension set.
Works very well.  Make sure you realize that 36" x 4 pieces is only 12 feet, total, which isn't a lot, especially if you have bends, high ceilings, and the link. In my case it *just* worked, since I didn't want to walk on my roof tile, and did this from the attic.  If I had been going from the room, it would have been too short by 6 feet or so.