Who all has made the switch in their firmware? I did it after graduating to a couple of DNA mods. Those caused me to put all my RX mods (4), Cuboid and VF Classic back in their boxes and on the shelf. Since making the change, I've pulled some of those mods back out for trial and use. I gotta say, I'm truly impressed with it. My trusty RX200S, which used to work well with TC vaping, had quit working. Even the latest Wismec update couldn't make TC work like it should. The upgrade to ArcticFox has put it on near DNA capable levels. Not quite DNA, but close enough for me. I've pulled out the VF Classic that I won last year and used once, then put away. On it, I've put the Crown II, another piece that came in the same basket I won. I'm using a single coil SS Clapton at 0.44 ohm and am enjoying how it's made a mediocre (at best) tank come to life. It will never reach my Aromamizer Supreme or Plus levels of vaping enjoyment, but it's really nice. My RX200S is better than ever before with the new firmware. This is one upgrade I suggest everyone try.