The screws used to mount to the rail are junk. I used a torque wrench to install the mount on my rifle and set it to a VERY low setting. They instantly stripped out. I ended up buying some nuts and bolts from Lowes to make the mount useable. An extra few dollars spent made the mount usable.
Pros: sets the scope forward for correct position
Cons: crappy mounting screws
This review was written in the old system and had content requirements that are different than reviews written today.