The ReadMe points to the pyserial-asyncio documentation, which is fine, except that to use this version of the package one has to import from serial_asyncio_fast instead of from serial_asyncio.
Perhaps adding a warning to the ReadMe would suffice? (Or did I miss something?).
Stumbled across this when I finally got around to switching from pyserial-asyncio to this pyserial-asyncio-fast.
(I am happy to submit a PR, but only if somebody in charge agrees that updating the ReadMe is a reasonable solution).