Product review (5 stars): WOW!! What a find!
WOW.  The best 33.00 I have spent in a long time!!  Very detailed instructions with warns so that the user does not mess up.  Follow the instructions as to which way the drill rotates (simple but obviously others missed that detail), tape the sections together just in case and go for it.  It navigated all of the tuens in my system (up to 90 degree turns) as well as multiple close proximity changes in angles in the line.  I cleaned a line that was 20' long (using the extension kit too) and extracted multiple loads of lint.  Using the shop vac and the included attachment is a must.  I love this thing!!!!