I’ve considered them. There are a couple of limitations to the chambers system:
1) There is no plate to convert the gun back to standard irons like in the IOS, DPO, and Atlas systems
2) All of the Chambers plates are BUI forward of the optic and their ACRO cut has no BUI option. I generally prefer a BUI behind the optic and recognize that this is a limitation with most of the IOS plates.
I suppose that I should mention WC’s True Zero plate system. It looks to sit a little higher, but is probably a great option for the EDC X9 and other external extractor guns that cannot get the IOS.