Product review (5 stars): Great Product
Our dryer was not drying well at all.  After checking the outside vent, we realized we had a clog.  I used a pipe snake and shop vac to clean out some of the vent which opened it up some.  We had over an inch of water that the shop vac pulled out of the line as it was condensing.. I never realized this could happen...  We decided to order this as the line was 25ft and the shop vac hose just didn't reach nor did it scrub lint from the sides of the PVC pipe...  The product worked just as descibed.  I hooked my shop vac up to the dryer end of the pipe.  And fed the line through the outside line.  I was surprised that we got a pile of lint the size of a 2 gal plastic milk jug..  After the intial cleaning, I was shocked we had this much left in the line... Bottom line..I think the product worked great.. I think we may be able to use it as well on the gutter downspouts...