We use SonarQube because of the big inbuilt database of code-smells, pitfalls and best-practices. We were already using Checkstyle, PMD and SpotBugs before, but decided that an "in-depth" analysis – after those three tools already submitted their reports – would be a welcomed addition for the presentation of found issues. The blame-feature of SonarQube is brilliant for internal communication and the integration of the already generated reports of the other tools saves time and speeds up build pipelines.