Sorry delayed on this. For a $40 set of sights, I think they're just fine for a gun sitting in a safe. Mounting them to the rib makes them tall and I suspect they'd get banged around a lot for duty service. But in the safe? Not concerned.
I'll sight them in next week and can give more thoughts. But the sight picture is good and the general construction is solid. I do need to take them back off and add some Vibratite to the screws. But they clamp firmly, only trick is to do a criss-cross pattern when you tighten them down. I tried going side-to-side and ended up with a little bit of the sight offset. But otherwise, nice and firm. I appreciate that the rear sight adjusts with a slot head set of screws, it is both elevation and windage adjustable.