The crucible is one of the advanced code review platforms with some extra features that are not available in many other similar platforms for reviewing the code.
1) It shows a well-organized directory structure and highlights the changed files. It comes with small next and previous arrows to perform seamlessly back
and forward on the reviewed file. Turns a code review into a threaded discussion and comment on specific source lines, files.
2) Old commits can be cleaned up with just a single click.
3) Get a quick view of the review status. When multiple reviewers review the same code at the same time then it popups a kind of notification to let the
individual reviewer know about it even during normal internet connectivity. And also displays the percent(%) of the review done by individual reviewers. Review collected by and hosted on G2.com.
It is the best platform. So far I haven't seen any negative points when it comes to its functionality.
But of course, I would suggest that it can be made more powerful by introducing AI/ML features. Review collected by and hosted on G2.com.