We had leafguard installed on our newly constructed house 6 years ago in the Seattle area. Service was fine, but be sure to read the warranty... It is guaranteed not to clog, which it never has... but the problem is all the pollen, pine needles, etc. that collect on the top of the gutter and then interfere with the water tension. The result is the water drips (in heavy rain it is like a waterfall) over the front side of the gutter making them useless. So they do not clog, but we have to clean the outside of them twice a year. I was shocked when I saw they had earhed a Good Housekeeping seal of approval since I would not recommend this product. read full review »