The ease of importing the rollbar python module makes converting custom error handling and exception handling to notify the Rollbar UI is very easy. The demo required 2 lines to add, and just replacing existing exception handlers was as easy running a search and replace.
The Live Dashboard on the front page is very useful to see if there is an active issue, although having a more granular information on the particular issue (which app/which user/which Ip) on the dashboard would be preferred.
The backtrace information for python was convenient , but it would be nice to also have meta information about the state of the system (current memory usage of app, active threads etc.) or have some post exception hook to auto populate company specific meta-data (i.e. in a microservice system, the state of other microservices or how far into the pipeline the exception occured).
The RQL Shell was something new I hadn't seen before, it seems promising, but would need more data from an evaluation to really know.
The User API was very straightforward, which in all honestly is what would be most likely the selling point to the app, as most of the time we would want to create a custom dashboard/application to view this data, and integrate with existing internal apps. Review collected by and hosted on G2.com.