Product review (5 stars): Excellent product
I used this product last weekend. It worked very well and the instructions are not really necessary, except for the obvious caveats, like not reversing the drill, reduce the drill torque to minimum, and if it seems like its getting stuck work from the other direction.  I used the dryer to blow the lint out of half, and the shop vac to suck the lint toward the dryer for the second half. I needed the extension kit because my run is over 40 ft.

The only problem I had was with the small lint cleaning brush for the dryer itself was defective because it was un-threaded. I called Gardus and they called me back on Monday, and I explained the defect and they just sent me a new one that arrived two days later, (I did not have to return the defective brush).

Also note that on my unit the rotary brush has a metal threaded insert...so they have recognised that plastic threading was insufficient and improved their design.

It worked very well and did a stunning job of cleaning out the lint, even from the 12 ft of flexible aluminum pipe that joins the dryer to the ridged pipe.