I work on an ETL platform and it definitely is a huge boost in certain things, but a drain in others.

We started working on a new product a few months ago and it's really dangerous up front on an empty code base. It can quickly write more code than you can comfortably understand. The more serious danger is when three people are all doing that at once. I had to bring this up at meetings and try to get a better review culture going.

Now that we're a few months in and changes are more targeted additions to an existing system we're happy with, it's _huge_ (which has been my experience on our existing product). I can drop a brief paragraph I speech-to-texted into my agent, give it a general starting place (where I imagine the issue/feature extension point is), and then tell it to do some research and propose a change. I'd guess it's about 50% of the time that I have to update it's implementation plan. Then I let it run (my favorite is setting this up before a meeting) and come back. Then we have to review the code and go from there.

Definitely a 50%+ speed up in some cases, but not all. It's also great for problems that procrastinating, as it reduces friction so much.