Depends on the version control and devops process your development teams adopt. Git (via Bitbucket, GitHub, GitLab, etc...) has become the new industry norm, and using pull requests can often provide the same code review features Crucible is used for. However, if you require code review beyond change/diff based (i.e. via pull request), then Crucible allows you to review code with more granular control, such as on per file basis.
Upsource is the best review tool we've found but it still has some flaws. Notably, it makes reviewing small and quick changes less convenient than they need to be, and diff viewing (especially collaboratively) can be tedious.
It does handle larger, iterative reviews well. Especially when using a feature branch, Upsource will track that branch and automatically add all commits to the review. You can then review the branch as a whole, or look at a subset of diffs.
It can sometimes be a bit slow to load. A server reboot for us tends to solve that issue. I'm not sure if it is a server issue, or maybe Crucible may have some caching issues.
I wish that you could easily stop the review creation process, rather than abandoning it.
Creating and closing reviews isn't as quick as it could be. You must create a review, assign reviewers, approve and close. I wish there would be a quick review-approve-close for a commit where the change is simple and doesn't require multiple review iterations.
Web based interface can be clunky, especially when looking at big diffs side-by-side
JetBrains IDE integration is somehow less convenient than going using it in browser.
Gitlab and GitHub are very comparable to Crucible, and would probably be my first choice if those were the tools used for versioning as they are directly linked to git. Crucible was chosen by a current client and I had no choice in its selection. I would probably have chosen GitHub if given a say.
Compared to the other tools we evaluated, Upsource was the only tool that allowed distinct reviews without needing explicit pull requests while still being able to go in-depth when required. The diff viewer is serviceable and better than the alternatives, as well, especially the side-by-side viewer.
I am not involved in the acquisition of Crucible so I cannot comment on the financial investment but I believe it is a necessary tool to have in any software shop, small or big.
As a developer, having Crucible as the code review process is a great asset and will save time and reduce risks which I believe is a positive return of investment.
