I'll say it has been marginally more useful integrated into my code editor, prompt driven for me has been useless output for too much effort, but it ambiently sitting there in code editor can be helpful.

I still can only get it to provide useful suggestions about 15-20% of the time for like two lines, maybe a nice error message, but the failure rate is less obnoxious if you didn't spend extra effort to ask for it and just ignore and keep going. Getting a feel for whether or not the LLM is likely to have something in the completion worth trying to review is a part of it based on what you've typed helps. Notably if you are some keystrokes into a very boilerplate process you might be more optimistic, or if you are about to provide a text string as a human error message, decent chance it wrote that for you well enough.

Still I'm more annoyed and not sure that it's worth being annoyed, but I could buy that shaving typing out a couple lines 15% of the time could be an objective boost that outweighs the burden of futzing with the high error rate.