Compared to a CM9 or PM9 they are extremely thick. I've had two and couldn't hit **** with either of them. I can sit a nice tight group with my PM9 though.
I have them as backup sights on two rifles and they have held up fine and hold accuracy well. Every time I pop them open they are still perfectly Co-witnessed to my optic. The only issue I've seen is that I had to shave some material off the ears to get them to close on an alloy picatinny rail...
Drive up I675 and you will see why nobody wants a landfill within 20 miles of them. That absurd 200' tall mountain of crap at I675&I285 is an abomination. They should have stopped filling it a decade ago.