How reliable is the documentation for the ch340g? I don't have experience with Olimex directly, and for production designs I'm wary of datasheets that are translated this poorly -- while they frequently are just fine, i've run into numerous cases where the translation has either introduced ambiguity or is just plain incomprehensible.

And that's the rub: if i get a legit ftdi chip, I have a high level of trust that it will do what it says, and there's tons of documentation.