I have been on xiaomi.eu for a while now, i switched before the 12.5 update, but i have not noticed performance issues, but i think it does heat a tad more at times, nothing to worry imo.i live in germany so my phone comes also with the EEA rom, so if you don't mind every app be killed in background and if you don't use mi music app, or don't mind high phone temperatures then go for it, this rom is running smoother than EEA but have these mentioned problems, other than these i didn't see other problems