Some of the autocomplete was okay in that it saved me some keystrokes at times, but in general, it felt like more of a distraction. I especially hated the suggested comments; these were almost never close to what I intended to write, and it would always give me a pause when they'd pop up, and often forget what I was about to write.
There were a few instances where it magically did autocomplete a surprising bit of code, and I enjoyed the novelty when it would happen, but that wore off quick.