APM monitoring

While monitoring of websites from pre-defined LogicMonitor servers does provide a good bit of insight, it doesn't really give the full flavor of what end users are experiencing along with insight as to performance issues with specific browsers and versions.  What I'd love to see from LogicMonitor is extension of functionality to include APM collection of metrics from the end user's browser itself (this is accomplished using cookies by other monitoring suites.)  Further, the metrics should be used to calculate the Apdex (http://apdex.org/members.html) score for the health of the site.