Product review (5 stars): Bleccch!!!  Amazing amount of fuzz!!!
OMG -- this system does everything it promises. I knew that there must be some excessive lint in the ducting as my dryer efficiency was impossibly low.  Things could dry faster if I just hung them up in the bathroom. I have about 4 ft. of flexible duct and an 8 ft solid duct that leads to the outside.  I think that the entire length must have been clogged (or so it would seem from the amount of fuzz I retrieved). The sharp 90 degree angle that is in the first part of the solid duct was no problem for the flexible rods.  It's easy to use. The instruction manual is very clear with lots of pictures to assist. I highly recommend this to anyone who wants to DYI instead of calling in a professional. (NOTE: it's a bit of a messy procedure, but well worth the effort.)