I had used different types of gutter guards in the past with my old gutters. The gutter guards I used slipped under the shingles, and I believe that led to my roof leaking. After replacing my roof and installed new gutters, I called LeafFilter. The salesman had samples and explained their product did not go under the shingles, that they installed special hangars. So although not cheap, I agreed. I have 5 trees around my house so this fall was a test. No leaves accumulated on the gutters as advertised. No more climbing on ladders. Totally pleased.
Bottom Line: Yes, I would recommend this to a friend