Idk what complaints people had previously, I've never used Calyx but Graphene has been great. Worst thing is the keyboard, but it's okay once you figure out how to get to the limited selection of emojis (hold enter) & also turn off autocorrect. Aside from that I actually prefer it to everything else I have used. No "phoning home" means battery life is amazing.

GrapheneOS has always had the exact same UX as AOSP. it's basically stripped down Pixel stock with a billion times better privacy and security.