I'm not a fan. I've heard nothing but good things about them but wasn't satisfied with my installation. I perfer rings that let me use alignment rods. The inserts let the alignment rods move around too much for that to be practical.

While my installation looked as if they were parallel to each other they were off center to the barrel. Tried them out and my shots were so far to the left that I maxed out my windage adjustment and still had two inches to go. I could have monkeyed around with the offset inserts but decided to can the whole thing and use Leupold Dual Dovetail bases. A trip to the range and I quickly found my zero.