At DocEngage we have been using Rollbar for more than year now.

We track real-time exception and respond to the issues quickly, sometimes we reach out to our customers before they find time to report the issue. This yields very impactful customer gratification. It also helps us to pinpoint the issue with real use case and evidence.

When we have issues with manful traces we observed there is less tension between developers and quality/support team.

We tried many competing real-time issue tracker and settled with Rollbar for its simplicity and integration capabilities.

We use Rollbar for tracking Java and Javascript exception and our effort to create integration hook was almost zero.

As far as collaboration is concerned, we love the way it's integrated with JIRA and HipChat.