Bought this for my Leupold FX-II 2.5x28mm Scout Rifle Scope. The mount was very solid and I was impressed they added a squared metal cross piece between the QR screws. This allowed the mounts additional contact with the rail and give it a more solid mount.
My problem was with the upper ring. If you look you can tell it is greater than half the diameter of a circle. If you look closely at the picture you can see where they shaved off some of the lower inside ring. I think this is to allow it to snap over the scope easier. My set included a Manufacturers defect: the screw hole pushed up a burr of metal right on this flat edge on the inside lower of the upper ring. If I had 'snapped' this ring on my scope it would have destroyed the matte finish and gouged my scope.
I'm returning my mount for a 50/50 ring system where both upper and lower rings meet in the middle.
I called Optics Planet and they quickly got me on the RMA path. Very happy with their customer service.
Pros: Solid, tight mount. Squared cross member for tight fit with rail
Cons: Upper ring requires force to attach to scope, potential for damage
This review was written in the old system and had content requirements that are different than reviews written today.