We're using the Jira integration and so far we really like it. One problem we have is that there is no way to associate a Dovico project with a Jira project. I am aware that the Dovico integration remembers which Dovico project you've previously selected (via cookie I assume), but this sometimes fails if you or someone in the team by accident selects the wrong project.
In that case the Dovico integration then remembers the wrong project and team members don't realize they're now logging their time against the wrong Dovico project. This means that on quite a few occasions we now have time entries from Jira project A against Dovico project B instead of Dovico project A.

We work in an agency setting where we have 30+ Jira projects at any one time and this is quite a high priority for us since we don't have the resources to double check that all time entries have been made against the correct Dovico projects.