Again, the kickstarter page and it's updates were fairly clear with alpha stage. As for the documentation, Paul said a few posts above:slzatz wrote: How could anyone possibly know that the esp8266 port isn't released yet and that the documentation doesn't match the current reality of the git repository? It seems fairly obvious that this is a problem that could be substantially mitigated with one sentence that said that the documentation is not consistent with the repository.
pfalcon wrote: No, documentation matches code only at the release points. And there was no release for MicroPython ESP8266 port yet. If you find that confusing, please kindly wait for the release.