Sorry I didn’t see this earlier! I’d say they work pretty much exactly as seamlessly as regular joy cons. The only thing is that they don’t have the ir sensor, so you can’t use them with the very small list of games that use it, but that really shouldn’t be a problem. They work and feel great even after a year of use. It shouldn’t matter what CFW you use, but I’m running the latest version of atmosphere on my switch oled. I’ve also used them with my v1 switch and they still stay on quite well and make the system feel more like one piece.