My experience with code review tools has been dreadful. In most cases I can remember the reviews are inaccurate, "you are absolutely right" sycophantic garbage, or missing the big picture. The worst feature of all is the "PR summary" which is usually pure slop lacking the context around why a PR was made. Thankfully that can be turned off.

I have to be fair and say that yes, occasionally, some bug slips past the humans and is caught by the robot. But these bugs are usually also caught by automated unit/integration tests or by linters. All in all, you have to balance the occasional bug with all the time lost "reviewing the code review" to make sure the robot didn't just hallucinate something.