[cguess]

Exactly the same for me. I will often get variable names autocompleted, but 90% of the time they're wrong, even when the right variables are declared sometimes in the same function or file I'm working on.

More than once has it shoved Python code into my Ruby file. Bash or YML files will often get comments added, but the wrong style for the language (which since I can never freakin' remember the style for every language actually makes me less productive since I have run the code, have it crash, and still go look up the language spec).

It keeps trying to autocomplete large hash manipulations, and it looks right, but subtly wrong in the syntax (missing commas or something) and then it's the same compile, crash, then stare at the code and have to add the same damn change for 50 lines of a hash when I should have just copied and pasted in the first place.

So far: net negative on my productivity. Plus, it sucks on shitty wifi like a plane or most hotels.