I really think it is all a matter of preference.Some people absoluty hate peeps. I have rifles with Williams Peeps, Thompson Center Peeps, and Lyman Peeps. I find them all very accurate but they also have drawback when light gets low. The best is the Lyman Peep. I can see clearest in low light with that peep. My Thompson Center Peep when the lighting is good is the most accurate of all my peeps.

I seriously considered a Lyman 57SMET for the Ultra Mag but after going with removable mounts on a Nikon Pro Staff I see no need for it. The fiber optic sights are fine out to 100 yards for me, and that's about as far as I care to shoot with open sights. Also where I hunt that's about as far as I ever would have to shoot.

Many years ago, we had a refrigerator cardboard box we set up in a field. With a Thompson Center Peep I was able to shoot out to 150 yards once I learned the drop of the ball, off a bench rest. We taped a white Paper Plate to the carton and it stuck out like a sore thumb. So peeps are a good thing for taking longer shots I guess.