Google maps seems to be not as good as the eu rom. If open a attachment ok Gmail I get aoad of weird Chinese apps including wps office and none of them work so probably need to download something else. Various Chinese pop ups but overall nothing that awful as have all my banking apps and GPay working so can't complain.
Same experience. I never got to test if GPAY worked, because the moment my banking app didn't work, it didn't matter whether gpay worked or not.
Out of curiosity, what are the downfalls for you of the Chinese ROM?