I like the Customers tab. It's a quick and easy way to find errors that happened to specific people and there is a lot of information there. I particularly like the raw data and the ability to see how many times/users an error happened to.

What I like the most is that as a team we can see the app exceptions when they occur, and quickly decide if we need to make the fix.

I like the UX/UI to see the issues in the endpoints, the way how to raygun split the applicants, apply filters, create dashboards, and most important the stack trace of the issue.