I have dozens of pine trees in my yard and Leaffilter is the only system that has ever worked on my house. I tried another gutter cover first but the pine needles clogged it up after 6 months.
I am shocked at these other reviews that are negative on here, and I would suspect they might be competitors and they could be lying about Leaffilter to make their product sound better.
I have had several friends and family members hire Leaffilter also and they are all well pleased. One piece was installed wrong in the valley but their service guy fixed it and we've never had any more issues and that was about 9 years ago.
Reason of review: Good customer service.
LeafFilter North Pros: Salesman product.