The more I install them the more I like them. I believe I like them due to the gfi built into them. What I think I now see is what a great idea it would have been to require "coordinated ground fault circuit protection " on general purpose lighting and receptacle branch circuits all along since gfi's first were developed. When I say coordinated I mean like this - say for instance ground fault protection set at 200 milliamps at the service, 50 milliamps at branch circuit breakers, and a 5 milliamp requirement at all the current required places. I think any real fire stopping attibuted to ark fault breakers is because of the gfi portion of the device . The Industry would have been better served to go about this as a ground fault protection issue, rather than a promise of reducing fires which may or may not happen, but at least there would be less fresh fodder for attorney's to mine.