When i purchased my house, one of the selling points was the gutter protection system that was installed, it was combination of the brush thing and then the plastic covers over that, so it seemed like a good idea, two gutter products that both claim that they never clog, however in the spring i soon found out that it was not only a failure but a premiere nesting cite for mesquites and wasps. after calling several pushy salesmen i did a bit of my own research.... I found a comprehensive review of all the products by http://ncreview.org, and there pick is gutter glove, I had the thing put in and it has been working flawlessly, the cost was a bit higher that the other products but was very reasonable however having the product actually work is better than paying a bit less and having the thing replaced anyway. the link to the review is: http://gutter-comparison-protection-covers-review.ncreview.org/ -Kevin