I've used it in some repos. It doesn't catch all code review issues, especially around product requirements and logic simplification, and occasionally produces irrelevant comments (suggesting a temporary model downgrade).

But it's well worth it. It has saved me some considerable time. I let it run first, even before my own final self-review (so if others do the same, the article's data might be biased). It's particularly good at identifying dead code and logical issues. If you tune it with its own custom rules (like Claude.md), you can also cut a lot of noise.