I am continually amazed at how well ghost ring style sights work. I have always thought they were awesome on my Garand and M1A, but also have them on my Marlin lever gun and my 10/22.
I had the 10/22 at the range this morning because I want to start leaving it next to the porch door for varmints, and wanted to check my zero. Fifty yards away, on a knee and barely seeing the ten ring with my old eyes, but centering up the ring and post, everything just goes in the ten ring, with even some bullseyes. I can barely do that with my red dot ARs.
Anyway, just a great, intuitive design (IMO).