While the Gutter Dome product keeps debris out, it doesn't do a great job in allowing water in(!). We had Gutter Dome professionally installed (by a "Gutter Dome Master Dealer") on our newly built home in July 2015.
We had the Gutter Dome product installed on all of our 6" gutters. The pitch of our roof is average (~30 degrees) so the speed of the runoff is not an issue. *Every time* it rains, whether light or heavy, rain water drips over the edge of the gutters around the entire house. Also, during the winter time, a greater number of icicles are created and dangerously hang over the roof edge.
We even had the installer put in "high volume" screens (coarser screen material) where the down spouts from a higher roof level joins the lower portion, but this has not solved the problem overall.
My next-door neighbor has a totally different type of gutter top and it works flawlessly. I would not recommend Gutter Dome to anyone and know there are better products out there that not only keep debris out, but will capture nearly 100% of the water coming down.
Review about: Gutter Dome Gutter Cover Installation.
Reason of review: Bad quality.
Monetary Loss: $4600.
Preferred solution: Full refund.
I didn't like: Performance of product.