RootCause provides you with a comprehensive set of tools to monitor and reproduce errors in web sites / applications. Using the built-in recorder feature you’ll know exactly what the user did. After an error has been logged, head over to the web based Replay Studio where you can replay the session to reproduce the error with one click.

This means you don’t have to read call stacks or parse through huge logs to be able to reproduce bugs. Using the Feedback button, you can also collect reports about visual / usability / rendering errors from your users.