Lead Filter product seems great. I am sure in some scenarios when the house is in a wide open area, it works great. But if the roof has debris in it because of trees in the yard, you will have problems. Here's how...
The stainless steel mesh is great, however the mircoscreen clogs. Imagine, their pitch is the mesh is so small not even a grain of sand gets through. I believe that as much as I believe the microscreen clogs. Once it does, the water runs off the gutter like there is not one present. It's like a waterfall.
Leaf Filter, after 2 years, came out and changed all the screens because "we have never really seen anything like this before." LOLOLOLOLOL... Sorry, I am trying to be professional about my discontent with Leaf Filter.
Bottom line is that you have to make sure your microscreen has to stay clean and that means YOU have to get on the roof and do it.
Review about: Leaffilter North Filter.