While I have had some good experiences with CC, I do use at least double the tokens and probably more like 5x going through fixes / debugging from its initial efforts. I don't think this is always bad, because it helps me to understand some of the more complicated interactions of existing and new code and improves documentation, but it's irritating when it runs out of usage allotments when it has broken something. There are some small things it never has managed to fix that I have to figure out myself, but again, I learn from that. Mapping out a data structure in advance and creating a plan before immediately coding can also help, but at least in our project, sometimes it just takes an incorrect approach and so I don't just let it go off and do things willy-nilly. I can't at all imaging having an agent free to maintain the code at this point, despite the past 2 weeks' hype cycles.